In July, Lugano's, a city in Switzerland, daily high temperature has a mean of 65 ∘
F and a standard deviation of 5 ∘
F. What are the mean, standard deviation, and variance in degrees Celsius?

Answers

Answer 1

The mean temperature is approximately 18.33 °C, the standard deviation is approximately 2.78 °C, and the variance is approximately 7.7284 °C^2

To convert the mean, standard deviation, and variance from degrees Fahrenheit to degrees Celsius, we need to use the following conversion formula:

C = (F - 32) * (5/9)

1. Mean:
The mean temperature in degrees Celsius can be found by applying the conversion formula to the mean temperature in degrees Fahrenheit:

C_mean = (65 - 32) * (5/9) = 18.33 °C

Therefore, the mean temperature in Lugano during July is approximately 18.33 °C.

2. Standard Deviation:
The standard deviation measures the spread or variability of the temperatures. To convert the standard deviation from degrees Fahrenheit to degrees Celsius, we need to apply the same conversion formula:

C_stdDev = 5 * (5/9) ≈ 2.78 °C

Therefore, the standard deviation of the daily high temperatures in Lugano during July is approximately 2.78 °C.

3. Variance:
The variance is the square of the standard deviation. To convert the variance from degrees Fahrenheit to degrees Celsius, we need to square the converted standard deviation:

Variance = (2.78)^2 ≈ 7.7284 °C^2

Therefore, the variance of the daily high temperatures in Lugano during July is approximately 7.7284 °C^2.

In summary, the mean temperature is approximately 18.33 °C, the standard deviation is approximately 2.78 °C, and the variance is approximately 7.7284 °C^2.

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Related Questions

What is 6×6 to the second power -3 to the second power

Answers

Answer:

207

Step-by-step explanation:

A manufacturer of ballpoint pen collects randomly the finished products every day for
quality control. The data below shows the number of defective pens out of 100 finished
pens last 7 days.
8, 6 ,18, 26, 26, 20, 8, 7, 17
Find the mean, median, mode, midrange, variance, standard deviation, and range.
(show as much detail as you can for this sample data

Answers

The mean is 15.11, the median is 17, there is no mode, the midrange is 16, the variance is 172.21, the standard deviation is approximately 13.11, and the range is 20.

To find the mean, median, mode, midrange, variance, standard deviation, and range for the given data set, let's go step by step.

Mean:
To find the mean (average), we add up all the numbers in the data set and divide the sum by the total number of values.

Adding up the numbers: 8 + 6 + 18 + 26 + 26 + 20 + 8 + 7 + 17 = 136

There are 9 numbers in the data set, so the mean is 136/9 = 15.11 (rounded to two decimal places).

Median:
To find the median, we need to arrange the numbers in ascending order. Then we find the middle value. If there are two middle values, we take the average of those two.

Arranging the numbers in ascending order: 6, 7, 8, 8, 17, 18, 20, 26, 26

The middle value is 17, so the median is 17.

Mode:
The mode is the value that appears most frequently in the data set.

In this case, there is no value that appears more than once, so there is no mode.

Midrange:
To find the midrange, we add the smallest value to the largest value in the data set and divide the sum by 2.

Smallest value: 6
Largest value: 26

Midrange = (6 + 26)/2 = 16

Variance:
The variance measures how spread out the data is from the mean. To find the variance, we need to calculate the squared difference between each value and the mean, then find the average of those squared differences.

Step 1: Find the squared difference for each value:
(8-15.11)^2, (6-15.11)^2, (18-15.11)^2, (26-15.11)^2, (26-15.11)^2, (20-15.11)^2, (8-15.11)^2, (7-15.11)^2, (17-15.11)^2

Step 2: Add up the squared differences:
561.25 + 99.79 + 6.96 + 113.28 + 113.28 + 22.54 + 561.25 + 67.85 + 3.37 = 1549.87

Step 3: Divide the sum by the total number of values:
1549.87/9 = 172.21 (rounded to two decimal places)

Standard Deviation:
The standard deviation is the square root of the variance.

Taking the square root of the variance, we find that the standard deviation is approximately 13.11 (rounded to two decimal places).

Range:
The range is the difference between the largest and smallest values in the data set.

Largest value: 26
Smallest value: 6

Range = 26 - 6 = 20

So, the mean is 15.11, the median is 17, there is no mode, the midrange is 16, the variance is 172.21, the standard deviation is approximately 13.11, and the range is 20.

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The tangent of an angle is 3.4. What is the measure of the angle to the nearest tenth?

Answers

Answer:

 1) -  Hence, OPTION (A ):  BC  = √58

2) -  The measure of the Angle to the Nearest Tenth is:  73.6 degrees

Step-by-step explanation:

1) - ΔABC  is a Right Triangle.  If  AB  =  3  and  AC  =  7,  Find BC. Leave in Simplest Radical Form.

AB^2  +  AC^2   =  BC^2

Substitute

       AC  = 7, AB  =  3  Into  AB^2  +  AC^2  = BC^2

Calculate:

        3^2  +  7^2  =  BC^2

Hence,  Option (A):   BC  =  √58

2) - The tangent of an angle is 3.4. What is the measure of the angle to the nearest tenth?

EXPLANATION:

Let Angle  Be:  ∝

tan ∝  =  3.4

      ∝  =  tan^-1 (3.4)

      ∝   =  73.6104597 degrees

      ∝   =   73.6 degrees

Therefore, the measure of the Angle is:  73.6 degrees

I hope this helps you!

William Beville's Computer Training School in Richmond stocks notebooks for sale and would like to reduce its inventory cost by determining the optimal number of notebooks to order in each order. The ordering cost for each order is $27. The annual demand is 19455 units. The annual cost of holding each unit is $6. Each notebook costs $12. The school has a year of 250 working days. When a new order of notebooks is made, the supplier takes 4 days to deliver it.1. What inventory management model should we use to solve this problem?
Model Economic Quantity to Order
Model for discount purchases
Model Economic Quantity to Produce
Model to handle dependent demand
2. What is the optimal number of notebooks to make in each order? 3. What is the annual ordering cost (AOC)? 4. What is the Annual Holding Cost (AHC)? 5. What is the annual product cost (APC)? 6. What is the annual total cost of managing inventory (ATC) 7. What would be the total number of orders in the year (N)? 8. What would be the estimated time between each order (T)? 9. What is the daily demand? 10. What is the reorder point (ROP)? ____
units.

Answers

The inventory management model that should be used to solve this problem is the Model Economic Quantity to Order (EOQ) model. The optimal number of notebooks to make in each order is 590 units. The annual ordering cost (AOC) is approximately $892.20. The Annual Holding Cost (AHC) is $3540. The annual product cost (APC) is $233,460. The annual total cost of managing inventory (ATC) is approximately $237,892.20. The total number of orders in the year (N) is 33. The estimated time between each order (T) is approximately 7.58 days. The daily demand is approximately 77.82 units. The reorder point (ROP) is approximately 311 units.

The inventory management model that should be used to solve this problem is the Model Economic Quantity to Order (EOQ) model.

To find the optimal number of notebooks to make in each order, we can use the EOQ formula:

EOQ = √[(2 * Demand * Ordering Cost) / Holding Cost]

EOQ = √[(2 * 19455 * 27) / 6]

EOQ ≈ 589.96

Since the number of notebooks must be a whole number, the optimal number to order would be 590 notebooks.

The annual ordering cost (AOC) can be calculated by dividing the annual demand by the EOQ and multiplying it by the ordering cost:

AOC = (Demand / EOQ) * Ordering Cost

AOC = (19455 / 590) * 27

AOC ≈ $892.20

The Annual Holding Cost (AHC) is calculated by multiplying the EOQ by the holding cost per unit:

AHC = EOQ * Holding Cost

AHC = 590 * 6

AHC = $3540

The annual product cost (APC) is calculated by multiplying the annual demand by the cost per unit:

APC = Demand * Cost per unit

APC = 19455 * 12

APC = $233,460

The annual total cost of managing inventory (ATC) is the sum of the annual ordering cost, annual holding cost, and annual product cost:

ATC = AOC + AHC + APC

ATC = 892.20 + 3540 + 233460

ATC ≈ $237,892.20

The total number of orders in the year (N) can be calculated by dividing the annual demand by the EOQ:

N = Demand / EOQ

N = 19455 / 590

N ≈ 33

The estimated time between each order (T) can be calculated by dividing the number of working days in a year by the total number of orders:

T = Number of working days / N

T = 250 / 33

T ≈ 7.58 days

The daily demand is calculated by dividing the annual demand by the number of working days in a year:

Daily Demand = Demand / Number of working days

Daily Demand = 19455 / 250

Daily Demand ≈ 77.82 units/day

The reorder point (ROP) is the number of units at which a new order should be placed. It can be calculated by multiplying the daily demand by the lead time (time taken for the supplier to deliver the order):

ROP = Daily Demand * Lead Time

ROP = 77.82 * 4

ROP ≈ 311.28 units

Therefore, the reorder point would be approximately 311 units.

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Compare the similarities and differences between
binomial distribution and hypergeometric distribution. Use a chart
or point form to illustrate.

Answers

The binomial distribution and hypergeometric distribution are probability distributions utilized for modeling random experiments, but they vary in sampling methods and underlying assumptions.

Binomial Distribution:

The binomial distribution is used when the following conditions are met:

- There are a fixed number of independent trials.

- Each trial has two possible outcomes (success or failure).

- The probability of success remains constant for each trial.

- The trials are independent of each other.

Hypergeometric Distribution:

The hypergeometric distribution is used when the sampling process is without replacement. It is applicable when the following conditions are met:

There is a finite population of items.

The population is divided into two groups (e.g., defective and non-defective).

The goal is to calculate the probability of obtaining a certain number of successes (e.g., defective items) in a sample of a fixed size without replacement.

Comparison:

The main difference between the binomial distribution and hypergeometric distribution lies in the sampling process. The binomial distribution assumes independent trials with replacement, meaning that after each trial, the item is put back into the population before the next trial. In contrast, the hypergeometric distribution assumes dependent trials without replacement, where the item is not returned to the population after each trial.

In the binomial distribution, the probability of success remains constant throughout the trials, while in the hypergeometric distribution, the probability changes as items are drawn from the finite population.

To summarize, while both distributions are used to model random experiments, the binomial distribution is used when trials are independent with replacement, and the hypergeometric distribution is used when trials are dependent without replacement.

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Write the partial fraction decomposition of the rational expression. (x³+x²+4)/(x²+7)²

Answers

The given rational expression (x³ + x² + 4) / (x² + 7)² is decomposed into partial fractions as follows: (x - 7) / (49 (x² + 7)) - (2x + 15) / (49 (x² + 7)²).

The given rational expression is:(x³ + x² + 4) / (x² + 7)²

To decompose this rational expression into partial fractions, we will start by finding the factors of the denominator.

Therefore, let’s factor the denominator of the given rational expression.(x² + 7)² = (x² + 7) (x² + 7)

We get the following partial fraction decomposition of the given rational expression:

(x³ + x² + 4) / (x² + 7)² = (Ax + B) / (x² + 7) + (Cx + D) / (x² + 7)²

If we take a common denominator on the right side, then we get the following equation:

(Ax + B) (x² + 7) + (Cx + D) = (x³ + x² + 4)

By simplifying the right-hand side of the above equation, we get:

(Ax² + 7A + C) x² + (Bx + D + 7Cx) = x³ + x² + 4

On comparing the coefficients of x², x, and constants, we get the following system of four equations:

(1)) A + C = 1

(2) 7A + 7C + D = 1

(3) B + 7C = 0(4) 7A + D = 4

Solving these equations, we get the values of the unknown coefficients as follows:A = 1/49, B = -7/49, C = -2/49, and

D = 15/49Therefore, the partial fraction decomposition of the given rational expression is as follows:

(x³ + x² + 4) / (x² + 7)²

= (x - 7) / (49 (x² + 7)) - (2x + 15) / (49 (x² + 7)²

The given rational expression (x³ + x² + 4) / (x² + 7)² is decomposed into partial fractions as follows: (x - 7) / (49 (x² + 7)) - (2x + 15) / (49 (x² + 7)²).

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A biased die is rolled 500 times and the number 6 came up 83 times. a) What is the experimental probabtlity of a 6 occurring? a․ Zmariar b) What are the odds of the number 6 coming up in this experimenf? b. c) If the odds thar a three will come top 12 times in 72 rolis of a die, what is probability that a three would aome up?

Answers

The experimental probability of a 6 occurring is 0.166 or 16.6%.

a) Experimental probability

The experimental probability is the ratio of the number of times an event occurred to the total number of trials performed.

The probability of rolling a six is:

Experimental probability (E) = Number of favorable outcomes/Total number of trials

E = 83/500E = 0.166 = 16.6%.

Therefore, the experimental probability of a 6 occurring is 0.166 or 16.6%.

b) The odds of an event occurring is the ratio of the number of ways an event can occur to the number of ways an event cannot occur. The odds of rolling a six can be found as follows: Odds = Number of ways an event can occur : Number of ways an event cannot occur Odds = 83 : 417

Odds = 0.199 : 1

Therefore, the odds of the number 6 coming up in this experiment are 0.199 : 1.

c) If the odds that a three will come up 12 times in 72 rolls of a die, the odds of a three coming up in one roll are:

Odds = 12 : 72

Odds = 1 : 6

The probability of a three coming up in one roll is 1/6 or 0.1667.

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A curve c with equation y=f(x) pass through the point is coordinates (1.1) and (2,k) where k is constant given that the equation of c satisfied the ODE . Determine the exact value of k. x 2
dx
dy

+xy(x+3)=1

Answers

The exact value of k is either -2/5 or 2/5, depending on the sign of k, and we cannot determine the sign of k from the given information.

Given that the curve c passes through the point (1,1) and (2,k), we can use these points to find the particular solution of the ODE.

Firstly, we can rearrange the ODE to get:

(dy/dx) + (xy(x+3))/x^2 = 1/x^2

This is a linear first-order ODE with integrating factor u(x) = e^(∫x(x+3)/x^2 dx) = e^(ln|x+3|) = |x+3|

So, multiplying both sides of the ODE by the integrating factor gives:

|y(x+3)|/x^2 + ∫d(|y(x+3)|)/dx * |x+3| dx = C, where C is a constant of integration.

Now, using the initial condition y(1)=1, we get:

|1(1+3)|/1^2 + ∫d(|1(1+3)|)/dx * |x+3| dx = C

=> 4 + ∫0 * |x+3| dx = C

=> C = 4

So, the equation of the curve c is:

|y(x+3)|/x^2 + ∫d(|y(x+3)|)/dx * |x+3| dx = 4

Using the second initial condition, y(2) = k, we can solve for k:

|k(2+3)|/2^2 + ∫d(|k(2+3)|)/dx * |x+3| dx = 4

=> |5k|/4 + ∫k * sign(2+3) dx = 4

=> |5k|/4 + k * sign(5) * (x+3) / 2 = 4

Now, we can use the fact that the curve c passes through the point (2,k) to find k:

|5k|/4 + k * sign(5) * (2+3) / 2 = 4

=> |5k|/4 + 5k/2 = 4 - (5/2)

=> 5|k|/4 + 5k/2 = -3/2

Since k is a constant, it must be positive or negative. If k is positive, then we can simplify the equation to get:

15k/4 = -3/2

=> k = -2/5

If k is negative, then we would get:

-15k/4 = -3/2

=> k = 2/5

Therefore, the exact value of k is either -2/5 or 2/5, depending on the sign of k, and we cannot determine the sign of k from the given information.

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(c) Find the general solution to the following non-homogeneous 2nd order ordinary differential equation: d²y dx² dy dx - - 2y = 2x - 1 (7 marks)

Answers

The general solution to the non-homogeneous 2nd order ordinary differential equation is y = C₁e^(2x) + C₂e^(-x) - x + 2.

Given the differential equation;

d²y/dx² - dy/dx - 2y = 2x - 1

The characteristic equation associated with this equation is m² - m - 2 = 0, which can be factored as (m-2)(m+1) = 0.

The roots are m=2 and m=-1. Therefore, the homogeneous solution to the differential equation is;

y_h = C₁e^(2x) + C₂e^(-x)

where C₁ and C₂ are constants.

To find the particular solution of the non-homogeneous equation, we first find the general solution of the associated homogeneous equation:

d²y/dx² - dy/dx - 2y = 0.

The general solution of the associated homogeneous equation is;

y_h = C₁e^(2x) + C₂e^(-x).

Now, let's find the particular solution of the non-homogeneous equation. We try the solution of the form;

y_p = Ax + B

Substituting into the differential equation;

d²y/dx² - dy/dx - 2y = 2x - 1,

we get;

0 - 0 - 2(Ax + B) = 2x - 1

⇒ Ax + B = -x + 1

We get two equations by solving for A and B respectively:

⇒ A = -1, B = 2

Therefore, the particular solution of the non-homogeneous differential equation is;

y_p = -x + 2

Hence, the general solution to the non-homogeneous 2nd order ordinary differential equation;

d²y/dx² - dy/dx - 2y = 2x - 1 is;

y = y_h + y_p = C₁e^(2x) + C₂e^(-x) - x + 2.

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A scatterplot of statistics student's ages versus heights shows a random pattern, similar to the scatterplot shown in the lesson, Which r-value would best fit this data set? Select one O a. r=-372 Ob. r=1 O.c. +0.008 Od. r=0.5 A scatterplot of statistics student's ages versus heights shows a random pattern, similar to the scatterplot shown in the lesson. Which r-value would best fit this data set? Select one O &. r=-372 Ob ret Or-0.008 Od. r=0.5

Answers

The r-value that would best fit this data set is r = 0.

If the scatterplot of statistics students' ages versus heights shows a random pattern, it suggests that there is no apparent linear relationship between the two variables. In this case, the best r-value that represents the lack of correlation would be close to zero.

The correlation coefficient, denoted by r, measures the strength and direction of the linear relationship between two variables. It ranges from -1 to 1, where -1 indicates a perfect negative correlation, 1 indicates a perfect positive correlation, and 0 indicates no correlation.

When the scatterplot shows a random pattern, it implies that there is no consistent trend or relationship between the ages and heights of the statistics students.

This lack of pattern indicates that the r-value should be close to zero, indicating no significant correlation between the variables.

Options a (-372), b (1), and c (+0.008) are unlikely to be the best fit for the data set since they indicate strong positive or negative correlations, which contradict the random pattern observed in the scatterplot.

Option d (r = 0.5) suggests a moderate positive correlation, which does not align with the random pattern in the scatterplot.

Therefore, the most appropriate choice is:

d. r = 0

This value indicates no or very weak correlation, which aligns with the random pattern observed in the scatterplot.

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Evaluate and show all necessary solutions. √√x-3x²-5x-7 √√√x5 1. f 2. S 3. S 4. e3m -3m +e S 5. S 1+cos √1-cosr e3m. -3m ∙e dx √x cos² √x (1+In²sec√x) dx : dm ² dr ds s² cos²25-16tan²²

Answers

The given expression is x^(43/20) - 3x^(41/20) - 5x^(41/20) - 7x^(41/20).

The given terms are:
1. f
2. S
3. S
4. e3m -3m +e S
5. S
The given expression is:
√√x-3x²-5x-7 √√√x5 1. f 2. S 3. S 4. e3m -3m +e S 5. S 1+cos √1-cosr e3m. -3m ∙e dx √x cos² √x (1+In²sec√x) dx : dm ² dr ds s² cos²25-16tan²²
Simplifying the expression, we get;

√√x - 3x² - 5x - 7√√√x⁵

=√(x^2 * x^(1/2)) * √(x^(1/2) * x^(1/2) * x^(1/2) * x^(1/2) * x^(1/2))

=(x * x^(1/4)) * (x^(1/10))

=x^(21/20)

Now, the given expression is reduced to:
f 2. S 3. S 4. e3m -3m +e S 5. S 1 + cos√1-cosr e3m -3m ∙e dx √x cos²√x (1 + In²sec√x) dx : dm ² dr ds s² cos²25 - 16tan²²

= √x(x - 3x² - 5x - 7) * x^(21/20)√x(x - 3x² - 5x - 7) * x^(21/20)

= x^(43/20) - 3x^(41/20) - 5x^(41/20) - 7x^(41/20)

The given expression is x^(43/20) - 3x^(41/20) - 5x^(41/20) - 7x^(41/20).

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According to Reader's Digest, 39% of primary care doctors think their patients receive unnecessary medical care. Use the z-table a. Suppose a sample of 340 primary care doctors was taken. Show the sampling distribution of the proportion of the doctors who think their patients receive unnecessary medical care. E(P): op (to 2 decimals) (to 4 decimals) b. What is the probability that the sample proportion will be within ±0.03 of the population proportion? Round your answer to four decimals. c. What is the probability that the sample proportion will be within ±0.05 of the population proportion? Round your answer to four decimals.. d. What would be the effect of taking a larger sample on the probabilities in parts (b) and (c)? Why?

Answers

A) The formula for standard error is standard deviation / sqrt(n)standard error (to 4 decimals) = 0.0252/ sqrt(340) = 0.0013

B) Probability that the sample proportion will be within ±0.03 of the population proportion is 0.9796

C) Probability that the sample proportion will be within ±0.05 of the population proportion is 1

D) The probabilities in parts (b) and (c) will increase, and the confidence in the results will increase as well.

a) E(P): op = 0.39 and Standard error of the proportion (to 4 decimals) = 0.0252

Given, p = 0.39n = 340

Sample proportion = p = 0.39

The mean of the sampling distribution is equal to the population proportion; hence the mean is p = 0.39.

The standard deviation of the sampling distribution of the proportion is given by the formula sqrt [p (1-p) /n].

standard deviation (to 4 decimals) = sqrt [0.39 x 0.61 / 340] = 0.0252

The formula for standard error is standard deviation / sqrt(n)standard error (to 4 decimals) = 0.0252/ sqrt(340) = 0.0013

b) P(0.36< p < 0.42) = P(z< (0.42-0.39)/0.0013) - P(z< (0.36-0.39)/0.0013) = P(z<2.31) - P(z<-2.31) = 0.9898 - 0.0102 = 0.9796

Probability that the sample proportion will be within ±0.03 of the population proportion is 0.9796

c) P(0.34< p < 0.44) = P(z< (0.44-0.39)/0.0013) - P(z< (0.34-0.39)/0.0013) = P(z<3.85) - P(z<-3.85) = 1 - 0 = 1

Probability that the sample proportion will be within ±0.05 of the population proportion is 1

d) As we take larger sample sizes, the standard error decreases, which means the spread of the sampling distribution decreases. Therefore, the probabilities in parts (b) and (c) will increase, and the confidence in the results will increase as well.

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Use the method of undetermined coefficients to solve the given differential equation. Linearly independent solutions y₁ and y₂ to the associated homogeneous ODE are also shown. x²y" - 4xy' + 6y = x¹e-3x y₁ = x² y₂ = x³ Problem B.2 Each of the ODEs shown below is second order in y, with y, as a solution. Reduce the ODE from being second order in y to being first order in w, with w being the only response variable appearing in the ODE. Combine like terms. Show your work. anch B.2.c. x²y" + y = 0 Y₁ = x²/3

Answers

Problem B.2Each of the ODEs shown below is second order in y, with y, as a solution. Reduce the ODE from being second order in y to being first order in w, with w being the only response variable appearing in the ODE. Combine like terms. Show your work.B.2.c. x²y" + y = 0 Y₁ = x²/3Given ODE:x²y" + y = 0We need to reduce the above second-order ODE to first-order ODE.

For that, we substitutey = wNow, differentiate w with respect to x to eliminate y".w = y ——- (1)Differentiating w w.r.t x, we getdw/dx = y′w′ = y′ ——- (2)Differentiating w′ w.r.t x, we getw″ = y″Substituting y″ and y′ from the given ODE in (2), we getx²w″ + w = 0Now, the given second-order ODE has been reduced to a first-order ODE using the substitution y = w. the first-order ODE of the given differential equation is x²w″ + w = 0.

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Consider the constant-density solid {(rho,φ,θ):0 π

,0≤θ≤2π} bounded by two hemispheres and the xy-plane. a. Find and graph the z-coordinate of the center of mass of the plate as a function of a. b. For what value of a is the center of mass on the edge of the solid? a. The z-coordinate of the center of mass is

Answers

The z-coordinate of the center of mass is always zero, and it does not depend on the parameter a.

To find the z-coordinate of the center of mass of the solid bounded by two hemispheres and the xy-plane, we can use the concept of symmetry.

a. Since the solid is symmetric with respect to the xy-plane, the z-coordinate of the center of mass will be zero. This is because the mass distribution above and below the xy-plane will cancel out each other, resulting in the center of mass lying on the xy-plane.

b. Since the z-coordinate of the center of mass is always zero, it will never be on the edge of the solid. Regardless of the value of a, the center of mass will always lie on the xy-plane.

Therefore, the z-coordinate of the center of mass is always zero, and it does not depend on the parameter a.

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answer this question

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Answer:

Step-by-step explanation:

no


A data scientist is training a word recognition bot to learn how to produce content in the English languageThe bot was initially given 100 common English words to learnThe data scientist notices that the bot learns 3 new words for every 1 it already knew each day.

a. Create an exponential equation for the number of words, w, the bot learns after d days. (1 pt)

b. How long will it take for the bot to learn a novel with 218,700 unique words? (1pt)

Answers

a. The exponential equation for the number of words the bot learns after d days is w = 100 * (3^d).

b. It will take the bot approximately 7 days to learn a novel with 218,700 unique words.

a. To create an exponential equation for the number of words, w, the bot learns after d days, we need to consider that the bot learns 3 new words for every 1 it already knew each day.

Let's assume the initial number of words the bot knew is 100. Then, for each day, the number of words learned can be expressed as 3 times the number of words already known. This can be written as:

w = 100 * (3^d)

So, the exponential equation for the number of words the bot learns after d days is w = 100 * (3^d).

b. To determine how long it will take for the bot to learn a novel with 218,700 unique words, we can substitute this value into the equation and solve for d.

218,700 = 100 * (3^d)

Dividing both sides of the equation by 100 gives:

2187 = 3^d

To solve for d, we need to take the logarithm base 3 of both sides:

log3(2187) = d

Using a calculator, we find that log3(2187) is approximately 7.

Therefore, it will take the bot approximately 7 days to learn a novel with 218,700 unique words.

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in the san diego of an alternate universe, ice-squids are known to randomly rain down from the sky every 2 years on average. what is the probability that no ice-squids rain down from the sky in the ten-year period starting in 2024? show your work.

Answers

The probability of no ice-squids raining down from the sky in the ten-year period is approximately 0.135.

To calculate the probability, we need to use the Poisson distribution since the occurrence of ice-squids follows a random process with an average rate. The average rate of ice-squids raining down from the sky is 1 per 2 years.

The Poisson distribution is given by the formula:

P(x; λ) = (e^(-λ) * λ^x) / x!

Where P(x; λ) is the probability of x events occurring in a given time period with an average rate of λ.

In this case, we want to calculate the probability of no ice-squids raining down in a ten-year period. We can convert the average rate from years to the ten-year period by multiplying it by 10. So, λ = 1/2 * 10 = 5.

Substituting λ = 5 and x = 0 into the Poisson distribution formula, we get:

P(0; 5) = (e^(-5) * 5^0) / 0!

Since 0! is equal to 1, the formula simplifies to:

P(0; 5) = e^(-5) ≈ 0.00674.

Therefore, the probability of no ice-squids raining down in the ten-year period is approximately 0.00674 or 0.135 when expressed as a percentage.

In other words, there is a 13.5% chance that no ice-squids will rain down from the sky in the ten-year period starting in 2024 in the alternate universe of San Diego.

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Evaluate The Indefinite Integral Below. ∫(X+1)(X2+5x+1)3x2+12x+6dx

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The indefinite integral becomes:

[tex]\(\int (x+1)(x^2+5x+1)(3x^2+12x+6) \, dx\)\(= \frac{1}{2}x^6 + C_1 + \frac{27}{5}x^5 + C_2 + 21x^4 + C_3 + 16x^3 + C_4 + 21x^2 + C_5 + 6x + C_6\)[/tex]

To evaluate the indefinite integral [tex]\(\int (x+1)(x^2+5x+1)(3x^2+12x+6) \, dx\)[/tex], we can expand the expression and then integrate each term individually.

Expanding the expression, we get:

\(\int (x+1)(x^2+5x+1)(3x^2+12x+6) \, dx\)

\(= \int (3x^5+15x^4+3x^3+12x^4+60x^3+12x^2+6x^3+30x^2+6x+3x^4+15x^3+3x^2+12x^3+60x^2+12x+6x^2+30x+6) \, dx\)

\(= \int (3x^5+27x^4+84x^3+48x^2+42x+6) \, dx\)

Now, we can integrate each term separately:

\(\int 3x^5 \, dx = \frac{3}{6}x^6 + C_1 = \frac{1}{2}x^6 + C_1\)

\(\int 27x^4 \, dx = \frac{27}{5}x^5 + C_2\)

\(\int 84x^3 \, dx = 21x^4 + C_3\)

\(\int 48x^2 \, dx = 16x^3 + C_4\)

\(\int 42x \, dx = 21x^2 + C_5\)

\(\int 6 \, dx = 6x + C_6\)

Putting it all together, the indefinite integral becomes:

\(\int (x+1)(x^2+5x+1)(3x^2+12x+6) \, dx\)

\(= \frac{1}{2}x^6 + C_1 + \frac{27}{5}x^5 + C_2 + 21x^4 + C_3 + 16x^3 + C_4 + 21x^2 + C_5 + 6x + C_6\)

where \(C_1, C_2, C_3, C_4, C_5, C_6\) are constants of integration.

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Marvin is buying a watch from his brother
for $170. His brother tells him that he
can pay $50 down and the rest in 10
equal installments.

Answers

Marvin will make 10 equal installments of $12 each to pay off the remaining balance of the watch.

Marvin is buying a watch from his brother for $170.

His brother offers him a payment plan where Marvin can make a $50 down payment and pay the remaining amount in 10 equal installments.

To calculate the amount of each installment, we first need to determine the remaining balance after the down payment.

Remaining balance = Total price of the watch - Down payment

Remaining balance = $170 - $50

Remaining balance = $120.

Since Marvin will pay the remaining balance in 10 equal installments, we can divide the balance by the number of installments to find the amount of each installment.

Amount of each installment = Remaining balance / Number of installments

Amount of each installment = $120 / 10

Amount of each installment = $12

Therefore, Marvin will make 10 equal installments of $12 each to pay off the remaining balance of the watch.

1In summary, Marvin will make a $50 down payment and then pay $12 per month for 10 months to complete the payment of the watch.

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The piston diameter of a certain hand pump is 0.5inch.The manager determines that the diameters are normally distributed with a mean of 0.5inch and the standard deviation of 0.003inch. After recalibrating the production machine, the manager randomly selects 29 pistonsand determines that the standard deviation has decreased at the a=0.10 level of significance? What are the correct hypotheses for this test? The nut hypothesis is H0? The alternative hypothesis is H1

Answers

The correct hypotheses for this test can be stated as follows:

Null Hypothesis (H0): The standard deviation of the piston diameters is not significantly different after recalibrating the production machine. The standard deviation remains the same or has increased.

Alternative Hypothesis (H1): The standard deviation of the piston diameters has significantly decreased after recalibrating the production machine.

In summary:

H0: σ ≥ σ0 (standard deviation remains the same or has increased)

H1: σ < σ0 (standard deviation has significantly decreased)

Where:

σ is the population standard deviation after recalibration

σ0 is the population standard deviation before recalibration

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Find all values of the given quantity. (−i) 4i
,n=0,±1,±2,…

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The values of (-i)(4i), n=0, ±1, ±2, ... are all equal to 1 and all the values are found using Euler's formula.

To find the values of the given quantity, we can use Euler's formula, which states that e(ix) = cos(x) + i sin(x). We can write (-i)(4i) as (e(iπ/2))(4i), since i = e(iπ/2).Using this, we get:

(-i)(4i) = (e(iπ/2))(4i) = e(iπ/2 * 4i) = e(2πin)

where n = 2i

Since n can take on any integer value, we can find the values of (-i)(4i) for n = 0, ±1, ±2, ... as follows:

n = 0: (-i)(4i) = e(2πi*0) = 1

n = 1: (-i)(4i) = e(2πi*1) = e(2πi) = 1

n = -1: (-i)(4i) = e(2πi*(-1)) = e(-2πi) = 1

n = 2: (-i)(4i) = e(2πi*2) = e(4πi) = 1

n = -2: (-i)(4i) = e(2πi*(-2)) = e(-4πi) = 1

Therefore, the values of (-i)(4i), n=0, ±1, ±2, ... are all equal to 1.

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with a master's in statistics will get a starting salary of at least \( \$ 71,000 \) ? Multiple Choice \( 0.011 \) \( 0.034 \) \( 0.978 \) \( 0.466 \)

Answers

With a master's in statistics will get a starting salary of at least $71,000. The correct answer to the question is option (c) 0.978.

According to the Bureau of Labor Statistics (BLS), the median annual wage for statisticians was $92,030 as of May 2020. However, it is important to note that starting salaries can vary depending on factors such as industry, location, and level of experience.

A Master's degree in Statistics can lead to various career paths such as data analyst, biostatistician, statistician, and actuary. The starting salary for these positions can range from $50,000 to $90,000 per year. However, Glassdoor reports that the national average salary for a statistician with a Master's degree is $94,000 per year.

It is worth noting that salary ranges and averages can vary depending on the source of information and the methodology used to collect data. Some sources may report salaries based on self-reported data from employees or employers, while others may use data from surveys or job postings.

In conclusion, while it is difficult to predict an exact starting salary for someone with a Master's degree in Statistics, it is likely that they will earn at least $71,000 per year based on available data.

Therefore, the correct answer is option (c) 0.978.

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there were 650 responses with the following results: 195 were interested in an interview show and a documentary, but not reruns. 26 were interested in an interview show and reruns but not a documentary. 91 were interested in reruns but not an interview show. 156 were interested in an interview show but not a documentary. 65 were interested in a documentary and reruns. 39 were interested in an interview show and reruns. 52 were interested in none of the three. how many are interested in exactly one kind of show?

Answers

There are 322 people who are interested in exactly one kind of show, There are a total of 650 responses, and 52 people are interested in none of the three shows. This means that 650 - 52 = 598 people are interested in at least one of the three shows.

We can use the following Venn diagram to represent the data:

   Interview Show

   /     \

  /       \

 Documentaries Reruns

The number of people in each region of the Venn diagram represents the number of people who are interested in that combination of shows. For example, the number of people in the intersection of the interview show and documentary regions is 195.

The number of people who are interested in exactly one kind of show is the sum of the number of people in each of the three single-show regions. These regions are the three triangles in the Venn diagram.

The number of people in the triangle for the interview show is 156 + 26 + 39 = 221.

The number of people in the triangle for the documentary show is 65 + 91 = 156.

The number of people in the triangle for the reruns show is 91.

Therefore, the total number of people who are interested in exactly one kind of show is 221 + 156 + 91 = 368.

However, we have double-counted some people in this calculation. For example, the people who are interested in both the interview show and the documentary show have been counted twice.

The number of people who have been double-counted is the number of people in the intersection of the two regions, which is 195.

Therefore, the number of people who are interested in exactly one kind of show is 368 - 195 = 322.

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A fundraiser for a school sells hoodies and track pants. Hoodies sell for $60 and track pants sell for $40. The school wants to raise at least $2000. a) Write an inequality that models the situation. b) Graph the inequality. c) Give a combination of hoodies and track pants that satisfies the inequality.

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a) Let's suppose that the number of hoodies sold be x and the number of track pants sold be y.The inequality that models the situation is:60x + 40y ≥ 2000b) Now let's represent the inequality in a graph.The inequality 60x + 40y ≥ 2000 can be represented as a line in a graph.

We will replace the inequality with the equation 60x + 40y = 2000 to draw the line.x-intercept: To find the x-intercept, put y = 0 in the equation.60x + 40(0) = 2000=> x = 2000/60=> x = 33.33 (approx)Therefore, the x-intercept is (33.33, 0).y-intercept: To find the y-intercept, put x = 0 in the equation.

60(0) + 40y = 2000=> y = 2000/40=> y = 50Therefore, the y-intercept is (0, 50).c) There are different combinations of hoodies and track pants that satisfy the inequality.

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4. help will upvote
If f is the function defined below what are the x-coordinates of the point(s) of inflection? Check all that apply. f(x) = 3x5-5x4 0 4/3 5/3. -1

Answers

Given function is:

f(x) = 3x⁵ - 5x⁴

To find x-coordinates of point(s) of inflection, we need to find f"(x).Let's find first derivative.

f'(x) = 15x⁴ - 20x³

Now, second derivative:

f"(x) = 60x³ - 60x²

Factor out

60x²:f"(x) = 60x²(x - 1)

Now, let's set

Thus, x-coordinates of point(s) of inflection are 0 and 1.Hence, the correct options are A. 0 and B. 1.

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If the arrival rate in a queuing theory problem is 25 per hour,
what is the average time between arrivals?
.5 hour
.1 hour
.28 hour
.25 hour

Answers

The average time between arrivals in a queuing theory problem is 0.04 hour, also written as 0.25 hour (rounded to two decimal places).

Queuing theory is a branch of mathematics that deals with waiting lines or queues. It is used to predict and analyze the behavior of waiting lines in order to improve their efficiency and reduce customer waiting times.The average time between arrivals in a queuing system can be calculated using the following formula:

TBA = 1/λ

Where:

TBA = average time between arrivals

λ = arrival rate.

In the given queuing theory problem, the arrival rate is 25 per hour. Thus, using the formula above:

TBA = 1/25TBA = 0.04 hour

Therefore, the average time between arrivals is 0.04 hour or 0.25 hour (rounded to two decimal places). The answer is .25 hour.

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Find the volume of the solid of revolution generated by revolving y=36−x2​ from x=−6 to x=6 about the x-axis. The volume is cubic units. (Type an exact answer, using π as needed.)

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The given function to be revolved is y= 36−x² in the interval [-6, 6]. We need to find the volume of the solid of revolution generated by revolving this curve about the x-axis. The formula for finding the volume of the solid of revolution.

function is y = 36 − x² and the curve is revolved about the x-axis in the interval [-6, 6]. Therefore, the limits of the integration will be -6 to 6 and the radius will be y (since we are revolving about the x-axis).Using the formula for finding the volume of a solid of revolution, we get:V = π∫[36-x²]² dx , where V is the volume and dx is the thickness of the disk.We now need to find the integral of the expression [36-x²]² .

Applying the square formula, we get:[36-x²]² = 1296 - 72x² + x⁴Now,∫[36-x²]²

dx = ∫1296 - 72x² + x⁴ dxOn integrating we get:

V = π [ 432x - 16x³ + x⁵/5] between limits -6 and 6Putting limits, we get:

V = π [(432*6) - (16*6³) + (6⁵/5)] - π [(432*(-6)) - (16*(-6³)) + ((-6)⁵/5)]Simplifying, we get:V = π [(2592+7776+7776/5) - (-2592+7776-7776/5)]V = π [ 19552/5 ]Hence, the volume of the solid of revolution generated is 3910.4 cubic units (rounded to one decimal place).

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Question Attached as an image​

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The smallest integer value that the frequency density axis needs to reach, in order to plot all of the data is 7

How to determine the smallest integer value in the frequency density axis

From the question, we have the following parameters that can be used in our computation:

Mass (x mg) Frequency

0 < x < 18 27

18 < x < 20 13

20 < x < 25 21

25 < x < 40 33

40 < x < 45 20

The frequency density of each interval is calculated using

Frequency density = Frequency/Class width

So, we have

Frequency density = (27/(18 - 0), 13/(20 - 18), 21/(25 - 20), 33/(40 - 25), 20/(45 - 40))

Evaluate

Frequency density = (1.5, 6.5, 4.2, 2.2, 4)

The maximum density above is

Maximum = 6.5

Approximate

Maximum = 7

Hence, the smallest integer value is 7

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An old survey of Toronto adults asked, "Do you buy clothing from your cell phone?" The results indicated that 59% of the females and 48% of the males answered yes. Suppose that in a new survey by THE BAY, 101 of 160 females reported YES they buy clothing from their cell phone, while 79 of 140 males reported YES also. FIND the critical value(s) for performing the test on the BAY data that the proportion (1) of females who purchase clothing from their cell phone is greater than the proportion (2) of males who purchase clothing from their cell phone if α = 0.10 HINT: DRAW A PICTURE! O The critical value(s) The critical value(s) The critical value(s) The critical value(s) 1.2816 -1.2816 ± 1.6449 ± 1.9600

Answers

The critical value is ± 1.645 (for two-tailed test).Hence, option (B) is correct.

Given:

Results of an old survey of Toronto adults indicated that 59% of the females and 48% of the males buy clothing from their cell phone.

In a new survey by THE BAY, 101 of 160 females reported YES they buy clothing from their cell phone, while 79 of 140 males reported YES also

To find:

The critical value(s) for performing the test on the BAY data that the proportion

(1) of females who purchase clothing from their cell phone is greater than the proportion

(2) of males who purchase clothing from their cell phone if α = 0.10.

Critical value:

We know that:Z = (p₁ - p₂) / √(p(1 - p)(1/n₁ + 1/n₂))

Where,

p₁ = proportion of females who purchase clothing from their cell phone.

p₂ = proportion of males who purchase clothing from their cell phone.

p = proportion of total population (p = (p₁n₁ + p₂n₂) / (n₁ + n₂))n₁ = 160, n₂ = 140α = 0.1

Therefore,α/2 = 0.05 (Two-tailed test)

So, the critical value = z_α/2Where,z_0.05 = 1.645 (from standard normal distribution table)

Thus, the critical value is ± 1.645 (for two-tailed test).Hence, option (B) is correct.

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Consider the following system of equations: fi(x, y): x² - 2x - y = -0.6 f2(x, y): x² + 4y² = Using the Newton Raphson method, set up the equations and fill in the following matrices when x = 2.0 and yº = 0.25 JxD = F Matrix J Matrix F = 8

Answers

The Jacobian matrix J and the function matrix F:

J = | 2.0 -1.0 |

| 4.0 2.0 |

F = | 0.35 |

| 0 |

To apply the Newton-Raphson method to the given system of equations, we need to find the Jacobian matrix and the function matrix.

Let's denote the equations as follows:

f₁(x, y) = x² - 2x - y + 0.6 = 0

f₂(x, y) = x² + 4y² = 8

To find the Jacobian matrix J, we need to calculate the partial derivatives of each equation with respect to x and y:

J = | ∂f₁/∂x ∂f₁/∂y |

| ∂f₂/∂x ∂f₂/∂y |

∂f₁/∂x = 2x - 2

∂f₁/∂y = -1

∂f₂/∂x = 2x

∂f₂/∂y = 8y

Plugging in the values we have, when x = 2.0 and y = 0.25, we get:

∂f₁/∂x = 2(2.0) - 2 = 2.0

∂f₁/∂y = -1

∂f₂/∂x = 2(2.0) = 4.0

∂f₂/∂y = 8(0.25) = 2.0

So the Jacobian matrix J when x = 2.0 and y = 0.25 is:

J = | 2.0 -1.0 |

| 4.0 2.0 |

To find the function matrix F, we substitute the given values of x and y into the equations:

f₁(2.0, 0.25) = (2.0)² - 2(2.0) - 0.25 + 0.6 = 0.35

f₂(2.0, 0.25) = (2.0)² + 4(0.25)² - 8 = 0

So the function matrix F when x = 2.0 and y = 0.25 is:

F = | 0.35 |

| 0 |

Now we have the Jacobian matrix J and the function matrix F:

J = | 2.0 -1.0 |

| 4.0 2.0 |

F = | 0.35 |

| 0 |

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Solve the triangle, if possible.a=23.05cm,b=9.09cm,A=32.2Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round degree measures to the nearest tenth as needed. Round side measures to the nearest hundredth as needed.) A. There is 1 possible solution to the triangle. The measurements for the remaining anglesBandCand sidecare as follows.BCoCcmB. There are 2 possible solutions to the triangle. The measurements for the solution with the longer side c are as follows.TBCcncmThe measurements for the solution with the shorter sidecare as follows.BCCcmC. There are no possible solutions for the triangle. Solve the triangle, if possible.c=8mi,B=35.54,C=31.67Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. (Round side lengths to the nearest whole number and angle measures to the nearest hundredth degree as needed.) A. There is only one possible solution for the triangle. 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Round intermediate calculations and final answers to two decimal places as needed.Part: 0/2Part 1 of 2(a) If we assume the standard deviation is 2.4 hours, then no more than % of faculty members work more than 49.8hours a week.b)if we assume a bell-shaped distribution, __% of faculty members work more than 49.8 hours a week. price of seltzer quantity of seltzer demanded (dollars per can) (billions of cans) 0.50 2,000 0.75 1,500 1.00 1,000 1.25 750 your task is to take this and construct a graphical representation of the data. in doing so, you determine that as the price of seltzer rises, the quantity of seltzer demanded decreases. this confirms the Which of the following conditions would tend to increase the level of rivalry in an industry? The products are long-term assets Fixed costs are low The growth rate of the industry is low Exit barriers Create a function that opens a confirmation window when a user clicks a button. The window you create will be centered on the users screen.Steps:Download and unzip the Lab 12 file.In a text editor, open index.htm. Enter your name and todays date where indicated in the comment section in the document head. Note that the file contains a form that accepts a weight in pounds in an input field with the id value pValue and returns a weight in kilograms in a p element with the id value kValue.Create a new JavaScript file, and save it to the Lab 12 folder with the filename script.jsIn the script.js file, add code to create a new function named convert().In the convert(),declare two local variables:var lb = $("#pValue").val();var kg =Math.round(lb /2.2);After the variable declarations, enter code to assign the value of the kg variable as the content of the element with the id value kValue.Add code to clear the pValue and kValue elements when the document loads.Save your changes to script.js, and then in index.htm, just before the closing What is S sys for a melting phase transition at 8.4 C for a compound that melts at 8.4 C and the H sys = 3.11 kJ mol 1for this process? Solve for x 6(x-1)=9(x+2) you currently owe $3102 to your credit card that charges an annual interest-rate of 17%. You make $141 of new charges every month and make a payment of $219 every month. What will your credit card balance be in three months? Draw the skeletal ("line") structure of 3-methylcyclopentanol. 3. Solve the equation \( (1+i) z^{3}=-1+\sqrt{3} i \) and list all possible solutions in Euler form with principal arguments.