Gina brought a notebook for 6.59 a backpack for 24.95 and a pen for 3.98 she paid 2.56 in sales tax and she had 2.81 left how much money did Tina have before her purchase

With a mean of 1.5 and a standard deviation of 0.35. if 5 rats are selected, the probability that their total completion time in the maze for all rats is between 6 and 8 minutes is 0.4455.

First, we need to convert the given mean and standard deviation from "one rat" to "five rats". The mean for five rats would be 5 x 1.5 = 7.5, and the standard deviation for five rats would be sqrt(5) x 0.35 = 0.87.  Next, we need to convert the given time range of 6-8 minutes to the standard normal distribution, using the z-score formula: z = (x - mean) / standard deviation.  

For 6 minutes, z = (6 - 7.5) / 0.87 = -1.72 ,For 8 minutes, z = (8 - 7.5) / 0.87 = 0.58  Finally, we can use a standard normal distribution table to find the probability that the rats will complete the maze in between 6 and 8 minutes. This is the area under the standard normal curve between -1.72 and 0.58. The probability is 0.4455.

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Answer:

18, 16, 22, 14, 17, 19, 15, 19, 22 add and divide by 9 = 17 feet

Step-by-step explanation:

The area of the shaded circular region is given as follows:

18π cm².

The shaded region is part of a circle, hence the area of the circle has to be obtained.

The area of a circle of radius r is given by the multiplication of π and the square of the radius, as follows:
A = πr².

The radius of the circle in this problem is given as follows:

r = 9 cm.

Hence the area of the entire circle for this problem is given as follows:

A = π x (9)² = 81π cm².

The shaded region corresponds to an angle of 80º, while the entire circumference corresponds to an angle of 360º, hence the area of the shaded region is obtained as follows:

A = 80/360 x 81π = 18π cm².

The figure is given by the image presented at the end of the answer.

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No these ratios 1/2 is not equal to 2/3 because 2/3 is not the multiple of 1/2

What is an equivalent ratios?

A ratio compares two quantities named as antecedent and consequent, by the means of division. For example, when we cook food, then each ingredient has to be added in a ratio. Thus, we can say, a ratio is used to express one quantity as a fraction of another quantity.

Two ratios are equivalent to each other if one of them can be expressed as the multiple of the other. Hence, to get the equivalent ratio of another ratio, we have to multiply the two quantities (antecedent and consequent) by the same number.

Given ratios are 2:1 and 3:1

we can write it as 2/1 and 3/1.

The lcm of 2 and 3 is 6.

Multiply denominator of both ratio with 6, we get

2/6 and 3/6 And we can see both the ratios are not equal.

Hence, there are not equivalent ratios.

4:1 and 8:3 are equivalent ratios -----> is false, because 4:1 is equivalent to 8:2

11:2 and 2:11 are equivalent ratios------> is false (because, are reciprocal ratios, not equivalent ratios)

3:1 and 9:3 are equivalent ratios ------> is true

because 3:1 multiply both sides by 3 -----> 3*3:1*3=9:3

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Answer:

  $18.97

Step-by-step explanation:

You want to know Ai Mi's bill if her $16 lunch had 6% tax added, and she tipped 14% on the amount with tax.

Adding tax multiplies the bill by (1 +6%) = 1.06.

Adding the tip on the amount with tax multiplies that amount by (1 +14%) = 1.14.

The total cost of Ai Mi's lunch is ...

  ($16(1.04))(1.14) ≈ $18.97

The total cost with tax and tip was $18.97.

<95141404393>

Answer:

To solve the equation cos (2x) = √2 - cos (2x), we can first isolate the variable on one side of the equation.

cos (2x) = √2 - cos (2x)

add cos(2x) to both sides

2*cos(2x) = √2

divide both sides by 2

cos(2x) = √2/2

Now we can use the identity cos 2x = 2cos^2 x - 1, so

2cos^2 x - 1 = √2/2

Square both sides

4cos^2 x - 2 = 2 - 1

4cos^2 x = 1

Divide both sides by 4

cos^2 x = 1/4

Since cos^2 x = 1/4, then cos x = +/- √(1/4) = +/- 1/2

So x = pi/3 + 2npi or x = 5pi/3 + 2n*pi

As per the unitary method, the original price of the watch is 217.11

The term unitary method is defined as a basic concept to find the value of a single unit and then using that value to find the value of multiple units.

Here we have given that the price of a watch was decreased by 35% and sold for $75. 99.

Let us consider that x be the original price of watch.

Here we have given that the amount of discount is calculated as,

=> 35% of x = 75.99

=> 35/100 of x = 75.99

When we simplify this then we get,

=> 0.35 of x = 75.99

Then the value of x is calculated as,

=> x = 75.99/0.35

=> x = 217.11

Therefore, the correct option is (D).

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The rate of change of the radius is -9/(2π*99) inches/second.

The volume of a cylinder can be found with the equation V = πr^2h, where V is the volume, r is the radius, h is the height and π is a constant. We know that the volume is constant at 1318 cubic inches and we know that the height of the cylinder is increasing at a constant rate of 9 inches per second.

V = πr^2h

1318 = π * 99^2 * h

Now we can differentiate this equation with respect to time.

dV/dt = 2πr*dr/dt * h + πr^2 * dh/dt

where dV/dt is the rate of change of the volume, dr/dt is the rate of change of the radius and dh/dt is the rate of change of the height.

Now we know that dV/dt = 0, dh/dt = 9 and we know the value of r, we can substitute these values in the above equation and solve for dr/dt

0 = 2π * 99 * dr/dt * h + π * 99^2 * 9

dr/dt = -9/(2π*99) inches/second

The rate of change of the radius is -9/(2π*99) inches/second at the instant when the radius of the cylinder is 99 inches.

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The diameter of the DVD in centimeters found by adding together the ridges and valleys across the diameter is about 11.998 centimeters.

The diameter of a circle is the measured distance between the outer rim of the circumference of the circle, passing through the center of the circle.

The number and dimensions of the ridges (bumps) and valleys (without bumps) on the DVD disc are as follows;

The number of bumps across the diameter = 73,000

The thickness of a bump = 0.00032 cm

The number of valleys across the diameter = 73,000

The thickness of valley = 0.000074 cm

The diameter of the circle left blank at the middle of the DVD disc = 4.26 cm

The diameter of the DVD, D, is therefore obtained by multiplying thickness of the bumps and valleys then adding the result to the diameter of the circle in the middle as follows;

D = 73,000 × 0.000032 cm + 73,000 × 0.000074 cm + 4.26 cm = 11.998 cm

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Answer:

Step-by-step explanation:

nai dunga

Answer:

it is 28 cm^2 ig

you got to solve it in the same way as the first question ( divide the shape into rectangles and find the area of each then add them )

To show that var(aX + bY + c) = a^2 var X + b^2 varY + 2ab cov(X, Y), we can start by using the definition of variance, which is var(X) = E[(X - E[X])^2], and the definition of covariance, which is cov(X, Y) = E[(X - E[X])(Y - E[Y])].

Variance is a measure of the spread of a random variable's possible values. It is defined as the expected value of the squared deviation of a random variable from its mean. For a random variable X, the variance is denoted as Var(X) or σ^2(X) and is calculated as:

Var(X) = E[(X - E[X])^2]

Using these definitions, we can write:

var(aX + bY + c) = E[(aX + bY + c - E[aX + bY + c])^2]

Using the properties of expectations and bilinearity, we can simplify this to:

var(aX + bY + c) = E[(a(X - E[X]) + b(Y - E[Y]))^2]

Expanding the square and using bilinearity again, we get:

var(aX + bY + c) = a^2 E[(X - E[X])^2] + b^2 E[(Y - E[Y])^2] + 2ab E[(X - E[X])(Y - E[Y])]

Since the expectations of (X - E[X])^2 and (Y - E[Y])^2 are equal to var(X) and var(Y) respectively, we can substitute these values into the above equation to get:

var(aX + bY + c) = a^2 var X + b^2 varY + 2ab cov(X,Y)

Therefore, we have shown that var(aX + bY + c) = a^2 var X + b^2 varY + 2ab cov(X,Y)

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Answer:

  (c)  a reflection across the y-axis followed by a translation 2 units up

Step-by-step explanation:

You want to know transformations that will give the red figure from the blue one.

The red figure is reversed left-to-right with respect to the blue figure, so a reflection across a vertical line is required. The only answer choice that has such a reflection is ...

C. a reflection across the y axis followed by a translation of 2 units up

Answer:

here

Step-by-step explanation:

18000 divided by 360, then multiply that new number with 48. i believe that is the correct math...

Answer:

240

Step-by-step explanation:

48/360*1800

240

Kasey is trying to run 60 miles by the end of the month.

Let us assume that Kasey tries to run 't' miles by the end of the month.

Kasey is 60% close to reaching her goal.

This means, she has already completed 40% of her goal.

Foven that she has already run 24 miles.

This means 40 percent of total distance is 24 miles.

i.e., 40 percent of 't' miles = 24 miles

We calculate 40 percent of t.

(40/100) × t = 24

(2/5) × t = 24

2 × t = 24 × 5

2 × t = 120

t = 120/2

t = 60 miles

i.e., she tries to run a 60 miles by the end of the month.

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D. The retail price of the phone is given as follows: 42.

E. The percent reduction in the price to $31.50 is given as follows: 25%.

The prices and the percentages are obtained applying the proportions in the context of this problem.

The purchase price is given as follows:

$12.

The markup rate is given as follows:

250%.

Meaning that the retail price is of 100% + 250% = 350% of the purchase price, hence it's value is obtained as follows:

3.5 x 12 = $42.

The percentage reduction is given by the reduction in the price divided by the initial price and then multiplied by 100%.

The reduction from $42 to $31.50 is given as follows:

42 - 31.50 = $10.50.

Hence the percent reduction is given as follows:

10.5/42 x 100% = 25%.

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Answer:

Step-by-step explanation:

X=32

where M is we can see that those 3 sections add up to make 180.

Therefore 180-96=84 and 84/2=42 so the angles by 84 on both side is 42 since we know that LM and MN is the same we can then determine that the angles in the middle triangle add up to make 180.  By looking at the proofs at the top NO and LM are the same so both the bottom angles in each triangle is 42. So we know that 84 is the addition of both the bottom angles 180 - 84 is 96. We set that equal to 3x. 3x=96 Divide both sides by 3 x is equal to 32.

Vector equation: r(t) = <1, -1, 7> + t<6, 7, -6>

Parametric equations:

x(t) = 1 + 6t

y(t) = -1 + 7t

z(t) = 7 - 6t

The vector equation and parametric equations describe the line segment that joins the two points p and q.

The vector equation is given by r(t) = <1, -1, 7> + t<6, 7, -6>

Here, <1, -1, 7> is the vector that represents the point p, and <6, 7, -6> is the direction vector of the line segment.

The variable t is a scalar parameter that describes the position of any point on the line segment.

The parametric equations are x(t) = 1 + 6t, y(t) = -1 + 7t, z(t) = 7 - 6t.

These equations express the coordinates of any point on the line segment in terms of the parameter t. So we can substitute any value of t between 0 to 1 in this equation to get the coordinates of a point on the line segment.

For example, if we substitute t = 0, we get x(0) = 1, y(0) = -1, z(0) = 7

which gives us the coordinates of point p.

Similarly, if we substitute t = 1, we get x(1) = 7, y(1) = 6, z(1) = 1

which gives us the coordinates of point q.

So, the line segment is defined by the set of all points whose coordinates are given by these equations for values of t between 0 and 1.

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mode is 5 and 2 because 2 and 5 occurs more times than other number

Mode: The most frequent number—that is, the number that occurs the highest number of times. Example: The mode of {4 , 2, 4, 3, 2, 2} is 2 because it occurs three times, which is more than any other number.

The total outcomes = 7

This is because the cube was rolled 7 times

The value recorded are

2, 1

4, 5

3, 2

2,2

1,3

6,2

5,3

From all the outcomes, the only possible out comes that shows that the sum of two numbers is more than 5 are

4, 5

6, 2,

5,3

Probability = possible outcomes / total outcomes

Possible outcomes = 3

Total outcomes = 7

Probability = 3/7

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Answer:

yes dont listen to anything isay because i just wants the points its to harda for me

Step-by-step explanation:

The maximum number of zeros that the polynomial function f(x) = 4x^9 + 5x^8 + 4x^6 + 9x + 1 may have is 9

A polynomial function is a function in an equation, such as the quadratic equation, cubic equation, etc., that only uses non-negative integer powers or only positive integer exponents of a variable.

A polynomial with an exponent of 1 is, for instance, 2x + 5.

The degree of a polynomial is the highest exponent in the polynomial, the polynomial in the problem is f(x) = 4x^9 + 5x^8 + 4x^6 + 9x + 1. The degrees of the polynomial is 9

The zeros of the polynomial will never be more than the degree of the polynomial

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Ms. Young should use the data to decide on her next steps.

Data in math is any information that is used to make decisions and/or can be used to analyze patterns. It can be numerical, such as statistics, or qualitative, such as observational data. Data can be collected in various ways, including surveys, experiments, and observations. Data can also be represented graphically, such as in charts or diagrams, to help better illustrate the patterns or trends it may contain. Data is often used in the context of problem solving and decision making and is a key element in the scientific method.

She should identify the areas of difficulty for Kim, where she is having trouble identifying coins. She should then design lessons that focus on these areas, providing more practice on identifying coins. Using a variety of instructional strategies, such as hands-on activities, games, and visual aids, can help Kim to better understand the differences between the coins and increase her accuracy. Additionally, Ms. Young should provide more frequent feedback to Kim on her performance to ensure that she is making progress. Finally, Ms. Young should consider decreasing the number of coins presented to Kim each day, to give her more time to practice and increase her accuracy.

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Answer: Undefined

Step-by-step explanation:[tex]\sqrt{x}[/tex]

This seems to be undefined.

Let's make a chart:

x #s | y #s

1

2

0

-1

-2

-------------------------------------

Let's take a number out of the chart to act as x:

f(x)=[tex]\sqrt{-2^4 -16}[/tex] -> f(x)=[tex]\sqrt{-16-16}[/tex] -> [tex]\sqrt{-32}[/tex]

Since the answer is negative, the answer should be the one that says undefined.

---- SORRY IGNORE WHAT I TYPED I JUST REALIZED IT IS WRONG PLS DELETE THIS

Answer:350

Step-by-step explanation: 35x10 =350

The probability of getting one defective component per customer is very low, less than 1/14,254. The probability of getting five defective components to a single customer is also low, 1/14,254. And the probability of getting two defective components to two different customers and the rest of the customers getting none is 10/14,254.

(a) The probability that each customer will receive one defective component is the probability that the five defective components will be drawn in a specific order, divided by the total number of ways the 50 components can be drawn. There are 5049484746 ways that the 50 components can be drawn, and 5! (5 factorial) ways that the defective components can be drawn in a specific order. So the probability is (5!)/(5049484746) = 1/14,254.

(b) The probability that one customer will have drawn five defective components is the probability that all five defective components will be drawn in a row, divided by the total number of ways the 50 components can be drawn. There are 5049484746 ways that the 50 components can be drawn, and 5! (5 factorial) ways that the defective components can be drawn in a row. So the probability is (1!)/(5049484746) = 1/14,254,

(c) The probability that two customers will receive two defective components each, two none, and the other one, is the probability that the five defective components will be drawn in a specific order and then divided among the five customers in a specific way, divided by the total number of ways the 50 components can be drawn. The number of ways to divide the defective components among the customers is 5!/(2!2!1!) = 10. There are 5049484746 ways that the 50 components can be drawn, and 5! (5 factorial) ways that the defective components can be drawn in a specific order, so the probability is (105!)/(50494847*46) = 10/14,254.

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Therefore , the solution of the given problem of surface area comes out to be Concave hexagonal area equals 24.

Its surface area serves as a proxy for how much overall space it occupies. The whole environment of a three-dimensional shape is taken into account when calculating its surface area. The overall size of something is its surface area. The volume of water in a cuboid can be determined by summing the faces on all of its six rectangular sides. To determine the box's measurements, apply the following formula: For 2lh, 2lw, but also 2hw, the surface is the identical (SA). The region is represented by the surface area of the muti form.

Here,

Given :

The Pythagorean theorem can be used to calculate the distance between it circle centers and the difference in the radii of two circles (4-2=2) to determine the lengths of the rectangle's sides. 

We can calculate the area of rectangular as well as the two triangles using that. The regions of the these three forms are added to create the hexagon's surface area.

Let d be the distance between both the circle centers in the scenario described.

d² = (4+2)^2

d = √((4+2)^2) = √(36) = 6

Rectangle area = 26 divided by 12

Each triangle's area is equal to (1/2)(2d)/(1/2)(2*6), or 6

Hexagonal area equals 12 + 2 * 6 = 24.

Concave hexagonal area equals 24.

Therefore , the solution of the given problem of surface area comes out to be Concave hexagonal area equals 24.

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Answer: 9 cm

Step-by-step explanation: Let's create a proportion. 20/50 = x/22.5. Using cross-multiplying, we get 22.5 x 20 = 50 times x. We can simplify this equation to get 450 = 50x. To get x by itself, we divide both sides of the equation by 50, leaving us with 9 = x, or 9 cm

Answer: 8 shirts for 128 shekels

Step-by-step explanation:

First, we can set up fractions and simplify to find the cost of one shirt.

5shirts/100shekels = 1shirt/20 shekels

8 shirts/128 shekels = 1shirt/16 shekels

Ultimately, whichever cost per shirt is lower is going to be the better buy. Since 16shekels/shirt is less than 20shekels/shirt, you are ultimately buying more shirts for a lower cost. Hope this helps

Answer: 4/10 of those people have cats because 3/5 multiplied by 2/3 is 4/10.

Rate of the given base $23,500 and the portion $6227.50 is equal to 26.5 percent ( nearest tenth ).

As given in the question,

Given base of the required rate is equal to $23,500

Portion of the given base used is equal to $6227.50

Formula to calculate the rate percent is given by :

Rate percent = [(Portion of the given base used) / ( Base) ] × 100

Substitute the value in the formula we get,

⇒ Rate percent = ( 6227.50 / 23,500 ) × 100

⇒ Rate percent = 26.5%

Therefore, rate percent of the given base and the portion used is equal to 26.5%.

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