the slope of line that passes through the points (20,30) and (40,14) is
a) -5/4
b) -4/5
c) 4/5
d) 5/4

From the power rules, it is possible to prove that [tex](\frac{1}{4})^{-4 }[/tex]=256.

The main power rules are presented below.

For proving the exercise, you should follow the steps below.

For this, you should write the reciprocal number with the exponent positive. Thus,[tex](\frac{1}{4})^{-4 }= 4^{4 }[/tex]

In the previous step, you found [tex]4^{4 }[/tex]. This represents that 4 x 4 x 4 x 4= 16 x 16=256.

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Answer:

5, -4

Step-by-step explanation:

Answer:

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

35 and 90 are the minimum and maximum values of the data set.

It means all observations are between those two numbers.

Hence the answer is 100%

Approximately 100% of the observations are between 35 and 90 in the given data set.

What is a median?

In statistics, the median is a measure of central tendency that represents the middle value of a set of data when arranged in ascending or descending order. It divides the data into two equal halves, with 50% of the values falling below the median and 50% falling above it.

To find the median, the data set is first arranged in order from smallest to largest (or vice versa). If the data set has an odd number of observations, the median is the middle value. For example, in a set of {1, 3, 5, 7, 9}, the median is 5.

The five-number summary consists of the minimum value, the first quartile (Q1), the median (Q2), the third quartile (Q3), and the maximum value. In this case, the minimum value is 35, and the maximum value is 90. Since these values define the range of the data set, all the observations are between these two values.

Therefore, approximately 100% of the observations are between 35 and 90.

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"The approximate value of D(4) is 24.6976." Please double-check your calculations and ensure that you correctly evaluated e^(-0.6) in your initial attempt. If you received a different answer, there may have been an error in the calculation.

To evaluate the expression D(4) = 45e^(-0.15(4)), we can follow the order of operations.

First, we simplify the exponent inside the parentheses:

-0.15(4) = -0.6

Next, we substitute this value back into the expression:

D(4) = 45e^(-0.6)

Using the properties of exponential functions, we can rewrite this as:

D(4) = 45 * e^(-0.6)

Now, we can calculate the value of e^(-0.6) using a calculator or mathematical software:

e^(-0.6) ≈ 0.5488 (rounded to four decimal places)

Finally, we substitute this value back into the expression:

D(4) ≈ 45 * 0.5488 ≈ 24.6976.

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Answer:

To find the perimeter (or arc length) of an ellipse, you'll need to use an elliptic integral

The perimeter is a distance around the outlines or edge of any shape. A practical example of measuring the perimeter of an ellipse would be the distance you cover when you walk along the edges of an elliptical-shaped field. Or the length of fence you need to surround it

The measurement closest to the number of ounces of sodium nitrate the scientist used is 3.17 ounces.

We are given that the scientist used 90 grams of sodium nitrate. To convert this measurement to ounces, we can divide the grams by the conversion factor of 28.3 grams per ounce.

90 grams / 28.3 grams per ounce ≈ 3.17 ounces

Since 3.17 ounces is the result of the conversion, it is the measurement closest to the number of ounces of sodium nitrate the scientist used.

It's worth noting that the conversion factor given, 28.3 grams per ounce, is an approximation, and the actual value may vary slightly depending on the specific substance being measured. However, for the purpose of this calculation and using the given conversion factor, 3.17 ounces is the closest measurement to the grams provided.

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The probability of getting $800 or $1000 is 0.125.

Sample space = {Bankrupt, $350, $400, $600, $800, Lose a turn, $700, $300, $450, $900, Bankrupt, $600, $900, $400, $750, $300, $500, $450, $1000, $250, $800, $600, $200, $550}

We know that, probability of an event = Number of favourable outcomes/Total number of outcomes.

Here, total number of outcomes = 24

a) P(bankrupt) = 2/24 = 1/12

b) P(at least $500) = 12/24 = 1/2

c) P($800) = 2/24

P($1000) = 1/24

P($800 or $1000) = 2/24 + 1/24

= 3/24

= 1/8

= 0.125

d) P(a maximum of $700) = 4/24 = 1/6

e) P(less than $400) = 5/24

f) P(lose a turn) = 1/24

Therefore, the probability of getting $800 or $1000 is 0.125.

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One change that can be made to one value in Dylan's plan to ensure the assignment is completed is to change hours worked to 4. 20 hours a day.

The current number of paper flowers that the team can make is:

= 4 x 3 hours a day x 12 people x 5 days per week x 2 weeks

= 1, 440 flowers

One change that can be made would be to increase the number of hours worked to 4. 20 hours.

This would give a total number of flowers of :

= 4 x 4. 20 hours a day x 12 people x 5 days per week x 2 weeks

= 2, 016 flowers

They would then meet the target.

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To achieve an equal mixture of milk and water, we need to remove and replace some of the mixture with water. Let's assume that we start with a certain amount of the mixture, and we remove x% of it and replace it with an equal amount of water.

To determine the value of x, we can use the following approach:

First, let's assume that we start with 100 units of the mixture. Therefore, we have 75 units of milk and 25 units of water in the mixture.

If we remove x% of the mixture, we will have (100 - x)% of the original amount left. After removing x%, the amount of milk in the mixture will still be 75 units, but the amount of water will be (75/25)*x = 3x units.

Now, we replace the removed x% of the mixture with an equal amount of water. Therefore, the amount of water in the mixture will increase by x% of the original amount, which is 25x/100. After the replacement, the amount of milk in the mixture will still be 75 units, but the amount of water will be (25 + 25x/100) units.

To achieve an equal mixture of milk and water, we need the amount of milk to be equal to the amount of water. Therefore, we can set up the following equation:

75 = (25 + 25x/100)/(2)

Solving for x, we get x = 33.33%.

Therefore, we need to remove and replace 33.33% of the mixture with water to achieve an equal mixture of milk and water.

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Answer:

Step-by-step explanation:

The correct answer is d. All of the above causes changes in the CPI to overstate the true inflation rate.

The final amount of money in the account after 5 years is $3,316.08.

We have,

P = 2400 (the initial deposit)

r = 0.065 (the annual interest rate expressed as a decimal)

n = 1 (compounded annually)

t = 5 (5 years)

Plugging these values into the exponential formula, we get:

A(5) = 2400(1 + 0.065/1)⁽¹ ˣ ⁵⁾

= 2400(1.065)⁵

≈ $3,316.08

Therefore, the final amount of money in the account after 5 years with an initial deposit of $2,400 and a 6.5% interest rate compounded annually is $3,316.08.

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The metric system is easier to use than the English system for several reasons.

Firstly, the metric system is based on multiples of 10, making conversions between units straightforward. In contrast, the English system has inconsistent conversion factors between units, such as 3 feet in a yard or 16 ounces in a pound, making calculations more complex. Additionally, the metric system uses a consistent set of prefixes to indicate values that are either smaller or larger than the base unit, which further simplifies calculations.

Finally, the metric system is used universally across the world, whereas the English system is only used in a few countries, making it easier for people to communicate and conduct business using a standardized measurement system. In contrast, the English system uses units such as yards, miles, quarts, and gallons, which have inconsistent conversion factors, making calculations more complex and challenging.

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Main Answer:The applicable steps to ensure fair data collection would be: Random sampling, informed consent, confidentiality and anonymity, and clear and unbiased questions.

Supporting Question and Answer:

Why is random sampling an important step in ensuring fair data collection for determining popular exercise classes?

Random sampling is important in fair data collection as it helps ensure that the selected participants represent the larger population of the gym. By randomly selecting participants, the data analyst reduces the risk of bias and ensures that the survey results are more likely to be representative of the preferences of the entire gym population.

Body of the Solution: To ensure the data collected for determining the most popular exercise classes is fair, the data analyst should consider the following steps:

Therefore, the applicable steps to ensure fair data collection would be: Random sampling, informed consent, confidentiality and anonymity, and clear and unbiased questions.

Final Answer: Hence,the applicable steps to ensure fair data collection would be: Random sampling, informed consent, confidentiality and anonymity, and clear and unbiased questions.

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The applicable steps to ensure fair data collection would be: Random sampling, informed consent, confidentiality and anonymity, and clear and unbiased questions.

Random sampling is important in fair data collection as it helps ensure that the selected participants represent the larger population of the gym. By randomly selecting participants, the data analyst reduces the risk of bias and ensures that the survey results are more likely to be representative of the preferences of the entire gym population.

To ensure the data collected for determining the most popular exercise classes is fair, the data analyst should consider the following steps:

The analyst should randomly select the 10 people to participate in the survey. This helps ensure that the sample is representative of the gym's population and reduces bias.

Informed consent: The analyst should obtain informed consent from the participants, explaining the purpose of the survey, how the data will be used, and ensuring that participants are willing to participate voluntarily.

Confidentiality and anonymity: The analyst should assure the participants that their responses will be kept confidential and anonymous. This encourages honest and unbiased responses, as individuals may feel more comfortable sharing their preferences without fear of judgment or repercussions.

Clear and unbiased questions: The survey questions should be clear, unbiased, and directly related to determining the most popular exercise classes. The questions should avoid leading or suggestive language that could influence participants' responses.

Sufficient sample size: While surveying 10 people can provide some insights, a larger sample size would increase the reliability and representativeness of the data. The analyst may consider increasing the sample size to obtain a more robust understanding of class preferences.

Therefore, the applicable steps to ensure fair data collection would be: Random sampling, informed consent, confidentiality and anonymity, and clear and unbiased questions.

Hence, the applicable steps to ensure fair data collection would be: Random sampling, informed consent, confidentiality and anonymity, and clear and unbiased questions.

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The total combat time in the game should be set as 60 minutes.

Let's denote the time spent on combatting as "c" (in minutes).

Based on the given information:

To find the total playtime, we add up all the components:

Total playtime = Combat time + Storytelling time + Exploring time + Puzzle-solving time + Hero creation time

or, Total playtime = c + 2c + 6c + c + 15

We know that the total playtime is 615 minutes, so we can set up the equation:

615 = 10c + 15

Simplifying the equation:

10c = 615 - 15

10c = 600

c = 60

Therefore, the total combat time in the game should be set as 60 minutes.

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The probability that a card is a spade or a king, given that it is black is 3/26 or 0.1154 or 11.54%

In a standard deck of cards, we have the following readings

Black cards = 26

Black spade or king = 3

So, we have the probability formula to be

Probability = Black spade or king/Black cards

This gives

Probability = 3/26

Evaluate

Probability = 0.1154

Express as percentage

Probability = 11.54%

Hence, the probability that a card is a spade or a king, given that it is black is 3/26

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If you deposit $2500 in an account that pays 6% annual interest, the account balance after one year can be calculated using the following formulas for different compounding periods:

- Annually: A = P(1 + r)^n, where A is the account balance, P is the principal, r is the annual interest rate, and n is the number of years. Substituting the given values, we get A = 2500(1 + 0.06)^1 = $2650.

Semiannually: A = P(1 + r/n)^(n*t), where n is the number of times the interest is compounded in a year and t is the time period in years. Substituting the given values, we get A = 2500(1 + 0.06/2)^(2*1) = $2659.51.

- Quarterly: A = P(1 + r/n)^(n*t), where n is 4 (number of times compounded in a year) and t is 1 (one year). Substituting the given values, we get A = 2500(1 + 0.06/4)^(4*1) = $2664.90.

- Monthly: A = P(1 + r/n)^(n*t), where n is 12 (number of times compounded in a year) and t is 1 (one year). Substituting the given values, we get A = 2500(1 + 0.06/12)^(12*1) = $2668.21.

- Continuously: A = Pe^(r*t), where e is the base of the natural logarithm. Substituting the given values, we get A = 2500*e^(0.06*1) = $2671.00.

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To test Acme's claim that 30% of the production run are rookies, 60% are veterans, and 10% are all-stars, you would use a hypothesis test. The null hypothesis would be that the claimed proportions are true (pR = 0.3, pV = 0.6, pA = 0.1) and the alternative hypothesis would be that at least one of the claimed proportions is incorrect.

You could use a goodness-of-fit chi-square test to compare the observed frequencies of each group of players in the package to the expected frequencies based on the claimed proportions. If the chi-square test statistic is large enough to reject the null hypothesis, then there is evidence that the claimed proportions are not accurate. The significance level would need to be chosen and the appropriate critical value for the chi-square distribution with 2 degrees of freedom would need to be calculated or looked up.

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The lists that shows grade levels in order from the greatest fraction of students to the least fraction of students is of:

7th grade, 8th grade, 5th grade, 6th grade, 9th grade.

Here, we have,

A fraction is a numerical representation of the division of the two values x and y, as follows:

Fraction = x/y.

The terms are called as follows:

x is the numerator of the fraction.

y is the denominator of the fraction.

The decimal equivalent, which is used to order the fractions, of a fraction is obtained by the division of the numerator of the fraction by the denominator of the fraction.

Hence the equivalents of each fraction are given as follows:

5th grade: 33/50 = 0.66.

6th grade: 13/20 = 0.65.

7th grade: 18/25 = 0.72.

8th grade: 51/75 = 0.68.

9th grade: 3/5 = 0.6.

Hence the order from greatest to least is of:

7th, 8th, 5th, 6th, 9th.

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complete question:

The table shows the fraction of students from different grade levels who are in favor of adding new items to the lunch menu at their school.

Which list shows the grade levels in order from the greatest fraction of students to the least fraction of students?

Responses

7th grade, 8th grade, 9th grade, 6th grade, 5th grade

7th grade, 8th grade, 9th grade, 6th grade, 5th grade

9th grade, 6th grade, 7th grade, 5th grade, 8th grade

9th grade, 6th grade, 7th grade, 5th grade, 8th grade

8th grade, 5th grade, 7th grade, 6th grade, 9th grade

8th grade, 5th grade, 7th grade, 6th grade, 9th grade

7th grade, 8th grade, 5th grade, 6th grade, 9th grade

The LCM of the two polynomials is (x - 1)(x + 4)(x + 1).

Let's factorize the given polynomials:

Polynomial 1:

x² + 3x - 4 can be factored as (x - 1)(x + 4).

Polynomial 2:

2x² - 2 can be factored as 2(x - 1)(x + 1).

Now, we identify the highest power of each distinct factor:

The highest power of (x - 1) is (x - 1).

The highest power of (x + 4) is (x + 4).

The highest power of (x + 1) is (x + 1).

Therefore, the LCM of the two polynomials is (x - 1)(x + 4)(x + 1).

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Answer:

[tex]a_{n}[/tex] = 2n + 8

Step-by-step explanation:

the nth term of an arithmetic sequence is

[tex]a_{n}[/tex] = a₁ + d(n - 1)

where a₁ is the first term and d the common difference

here a₁ = 10 and d = a₂ - a₁ = 12 - 10 = 2 , then

[tex]a_{n}[/tex] = 10 + 2(n - 1) = 10 + 2n - 2 = 2n + 8

The GCF of the given literal terms m⁷ n⁴ p³ and mn¹² p⁵ is mn⁴p³.

To find the greatest common factor (GCF) of the given literal terms, we need to identify the highest power of each variable that appears in both terms.

The variables present in both terms are m, n, and p.

For m, the highest power is m⁷ in the first term and m¹ in the second term. Therefore, the common factor for m is m¹.

For n, the highest power is n⁴ in the first term and n¹² in the second term. Therefore, the common factor for n is n⁴.

For p, the highest power is p³ in the first term and p⁵ in the second term. Therefore, the common factor for p is p³.

Combining these common factors, we get the GCF of the given literal terms:

GCF = m¹ * n⁴ * p³

Therefore, the GCF of the given literal terms m⁷ n⁴ p³ and mn¹² p⁵ is mn⁴p³.

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Answer:

Long solution

Step-by-step explanation:

(a) Let the height of the cone be h cm. The volume of the hemisphere is given by (1/2)(4/3)πr³ = (2/3)πr³. The volume of the solid is the sum of the volumes of the hemisphere and the cone, which is (2/3)πr³ + (1/3)πr²h. Since the volume of the hemisphere is one third of the volume of the solid, we have:

(2/3)πr³ = (1/3)πr²h

Simplifying, we get:

2r = h

Therefore, h is expressed in terms of r as h = 2r.

(b) The slant height of the cone can be found using the Pythagorean theorem. Let l be the slant height, then we have:

l² = r² + h²

Substituting h = 2r, we get:

l² = r² + (2r)² = 5r²

Taking the square root of both sides, we get:

l = r√5

Since k is an integer, we can write:

l = Vk cm, where k is an integer

Comparing the two expressions, we get:

Vk = r√5

Therefore, the value of k is k = ⌊r√5⌋, where ⌊x⌋ denotes the largest integer less than or equal to x.

(c) The total surface area of the solid is the sum of the curved surface area of the cone, the curved surface area of the hemisphere, and the area of the circular base of the cone. We have:

Curved surface area of the cone = πr l = πr(r√5) = πr²√5

Curved surface area of the hemisphere = 2πr²

Area of the circular base of the cone = πr²

Therefore, the total surface area of the solid, in cm², is given by:

πr²√5 + 2πr² + πr² = (πr²)(√5 + 3)

We have the iterated integral:

∫

�

=

0

2

∫

�

=

1

5

5

(

�

+

�

)

(

2

−

�

2

)

�

�

�

�

∫

y=0

2

​

∫

x=1

5

​

5(x+y)(2−y

2

)dxdy

To convert this to polar coordinates, we need to express $x$ and $y$ in terms of $r$ and $\theta$. Since the region of integration is defined by $0 \leq y \leq 2$ and $1 \leq x \leq 5$, we see that $1 \leq r \leq 5$ and $0 \leq \theta \leq \pi$. Then we have:

�

=

�

cos

⁡

�

and

�

=

�

sin

⁡

�

x=rcosθandy=rsinθ

The Jacobian of the transformation is $\frac{\partial(x,y)}{\partial(r,\theta)} = r$, so we have:

\begin{align*}

\int_{y=0}^{2} \int_{x=1}^{5} 5(x+y)(2-y^2) ,dx,dy &= \int_{\theta=0}^{\pi} \int_{r=1}^{5} 5(r\cos \theta + r\sin \theta)(2 - r^2\sin^2 \theta) ,r,dr,d\theta \

&= \int_{\theta=0}^{\pi} \int_{r=1}^{5} 10r^2\cos \theta ,dr,d\theta + \int_{\theta=0}^{\pi} \int_{r=1}^{5} 10r^2\sin \theta \cos \theta ,dr,d\theta \

&\quad + \int_{\theta=0}^{\pi} \int_{r=1}^{5} 5r^3\sin \theta ,dr,d\theta - \int_{\theta=0}^{\pi} \int_{r=1}^{5} 5r^5\sin^3 \theta ,dr,d\theta \

&= \int_{\theta=0}^{\pi} \left[ \frac{10}{3}r^3\cos \theta \right]{r=1}^{r=5} ,d\theta + \int{\theta=0}^{\pi} \left[ \frac{5}{2}r^3\sin^2 \theta \right]{r=1}^{r=5} ,d\theta \

&\quad + \int{\theta=0}^{\pi} \left[ \frac{5}{4}r^4\sin \theta \right]{r=1}^{r=5} ,d\theta - \int{\theta=0}^{\pi} \left[ \frac{5}{6}r^6\sin^4 \theta \right]{r=1}^{r=5} ,d\theta \

&= \int{\theta=0}^{\pi} \frac{1240}{3}\cos \theta + \frac{60}{2}\sin^2 \theta + \frac{155}{4}\sin \theta - \frac{2480}{6}\sin^4 \theta ,d\theta \

&= \left[ \frac{1240}{3}\sin \theta - \frac{60}{2}\frac

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Both expressions are equivalent and represent the same result. So the final answer is that the new position of the submarine in relation to sea level is -1,320 feet.

To find the new position of the submarine in relation to sea level, we need to take into account its initial position and the rate at which it descends.

The submarine starts at a depth of -1,260 feet, so this will be our starting point.
We know that the submarine descends at a rate of 5 feet per minute for 12 minutes. To calculate how far it descends in total, we can multiply the rate by the time:
5 feet/minute x 12 minutes = 60 feet
So the submarine descends 60 feet in total. However, since it is descending, we need to subtract this value from the initial depth of -1,260 feet:
-1,260 feet - 60 feet = -1,320 feet
Therefore, the expression that represents the new position of the submarine in relation to sea level is:
-1,260 - (5 x 12) = -1,320
Alternatively, we could also write this as:
-1,260 + (-5 x 12) = -1,320
Both expressions are equivalent and represent the same result. So the final answer is that the new position of the submarine in relation to sea level is -1,320 feet.

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Answer:

Step-by-step explanation:

the answer is B

Of total variation in "dependent-variable", the proportion which is explained by variation in "independent-variable" is called (b) coefficient of determination.

The "Coefficient-Of-Determination", denoted as R², is a statistical measure which represents the proportion of total-variation in the dependent variable which can be explained by  variation in "independent-variable".

It quantifies the percentage of dependent variable's variability which can be attributed to the independent variable. A higher coefficient of determination indicates a stronger relationship between the variables, which means that more of variation in "dependent-variable" can be accounted for by changes in the independent-variable.

Therefore, the correct option is (b).

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The given question is incomplete, the complete question is

Of the total variation in the dependent variable, the proportion that is explained by the variation in the independent variable is called

(a) the coefficient of correlation

(b) the coefficient of determination

(c) the coefficient of skewness

(d) none of the above

The maximum vertical distance between the line y = 2x + 63 and the parabola y = x^2 for -7 ≤ x ≤ 7 is 32 units.

To find the maximum vertical distance between the line y = 2x + 63 and the parabola y = x^2 for -7 ≤ x ≤ 7, we need to determine the points on the parabola that have the maximum vertical distance from the line.

Let's start by finding the points of intersection between the line and the parabola. Setting the equations equal to each other, we have:

2x + 63 = x^2

Rearranging the equation, we get:

x^2 - 2x - 63 = 0

Solving this quadratic equation, we find that x = -7 and x = 9 are the x-coordinates of the points of intersection.

Now, let's calculate the corresponding y-values for these x-coordinates on the parabola:

For x = -7, y = (-7)^2 = 49

For x = 9, y = (9)^2 = 81

Next, we can calculate the y-values for the line at these x-coordinates:

For x = -7, y = 2(-7) + 63 = 49

For x = 9, y = 2(9) + 63 = 81

Since the y-values of the line and the parabola are the same at the points of intersection, the maximum vertical distance occurs at the point (-7, 49) and (9, 81).

The maximum vertical distance between the line and the parabola is the difference in y-coordinates at these points:

81 - 49 = 32

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Answer:

#2

Step-by-step explanation:

Circle A'B'C'D' is smaller than circle ABCD. This means the scale factor must be less than one. 7/3 is greater than one, so it is false.

The total population of ducks is 960.

To estimate the total population of ducks, we can set up a proportion using the marked ducks as a sample.

Let's use the following proportion:

Total Ducks / Marked Ducks = Total Marked Ducks / Marked Ducks Counted

Total Ducks / 257 = 960 / 257

Total Ducks x 257 = 960 x 257

Divide both sides by 257 to solve for Total Ducks:

Total Ducks = (960 x 257) / 257

Total Ducks = 960

Based on the proportion, we estimate that the total population of ducks is 960.

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Answer:

1/3

Step-by-step explanation:

X is exactly halfway between 1/6 and 1/2, ie it is the average of those values.

average of 1/6 and 1/2 = (1/6 + 1/2) /2

= (1/6 + 3/6) /2

= (4/6) /2

= (2/3) /2

= 1/3