What is the average rate of change for the number of shares from 2 minutes to 4 minutes?

the probability of choosing H or P in either selection is 0.84

Two random letters are selected from the word Happy, and we want to find the probability of choosing H or P in either selection.

There are 5 letters, 1 is an H, 2 are P's.

Then the probability of selecting one of these 3 in the first selection is:

p = 3/5 = 0.6

And if we don't chose any of these in the first selection we had the probability:

q = 2/5 = 0.4 (choosing one of the a's)

the probability of choosing one of the p's or the H in the second is again:

q' = 3/5 = 0.6

The joint probability is:

Q = q*q' = 0.4*0.6 = 0.24

Then the total probability is:

p + Q = 0.6 + 0.24 = 0.84

The correct option is the second one.

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The quadratic parent function is f(x) = x^2, which is a U-shaped curve that passes through the origin. When we apply transformations to the quadratic parent function, its shape and position change accordingly.

One of the most common transformations applied to the quadratic parent function is vertical translation, which shifts the entire graph up or down. If we add a constant k to the function, the graph is shifted k units up. Similarly, if we subtract a constant k from the function, the graph is shifted k units down.Another common transformation is horizontal translation, which shifts the entire graph left or right.

If we replace x with x + h in the function, the graph is shifted h units to the left. If we replace x with x - h, the graph is shifted h units to the right.These transformations can be combined to create a variety of different quadratic functions. Each transformation changes the position or shape of the graph in a specific way, allowing us to create complex and interesting functions from the simple quadratic parent function.

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Guadalupe drove at an average speed of 33.75 miles per hour.

To find the average speed, we need to divide the total distance by the total time:

Average speed = t d/t t

Guadalupe drove 45 miles in 1 1/3 hours, which is the same as 4/3 hours.

So, average speed = 45 miles / (4/3) hours

= 45 x 3/4

= 33.75 miles per hour (rounded to two decimal places)

Therefore, Guadalupe drove at an average speed of 33.75 miles per hour.

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From comparing three investment accounts offering different rates, Account A will give Grady at least a 5% annual yield. Therefore, the correct option is option 1.

To determine which investment account will give Grady at least a 5% annual yield, we will need to calculate the Annual Percentage Yield (APY) for each account and compare them. Here are the given terms for each account:

Account A: APR of 4.95%, compounding monthly

Account B: APR of 4.85%, compounding quarterly

Account C: APR of 4.75%, compounding daily

1: Use the APY formula:

APY = (1 + r/n)^(nt) - 1

where r is the annual interest rate (as a decimal), n is the number of compounding periods per year, and t is the number of years.

2: Calculate APY for each account.

Account A:
APY = (1 + 0.0495/12)^(12*1) - 1
APY ≈ 0.0507 or 5.07%

Account B:
APY = (1 + 0.0485/4)^(4*1) - 1
APY ≈ 0.0495 or 4.95%

Account C:
APY = (1 + 0.0475/365)^(365*1) - 1
APY ≈ 0.0493 or 4.93%

3: Compare the APYs to determine which account(s) meet the 5% annual yield requirement.

Based on the calculations, Account A has an APY of 5.07%, which is greater than the 5% annual yield requirement. Therefore, Account A will give Grady at least a 5% annual yield.

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To determine if a table or a set of ordered pairs can be modeled by a quadratic function, you should look for the following characteristics:

1. Consistent differences: Examine the differences between consecutive y-values. If there's a constant second difference (i.e., the differences between consecutive first differences remain the same), it's likely that the data can be modeled by a quadratic function.

2. Parabolic shape: Graph the ordered pairs. If the graph resembles a parabola (a U-shaped or inverted U-shaped curve), it indicates that the data can be modeled by a quadratic function.

By analyzing the ordered pairs and their differences, as well as examining the shape of the graph, you can determine if a quadratic function is the best fit for the data.

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Yes, if you were to randomly survey 20 people at 50 random high schools, it would be considered a random sample because the process involves randomly selecting people from randomly selected high schools, which prevents selection bias..

A random sample is a subset of a population in which every individual has an equal chance of being selected. In this case, the population is the students at the high schools.

By randomly selecting the 50 high schools, you ensure that each school has an equal opportunity to be part of the sample. This helps to prevent selection bias, as no specific schools are deliberately chosen. Moreover, by surveying 20 random people within each selected school, you further eliminate bias, as each student at the school has an equal chance of being selected for the survey.

This random sampling method is beneficial because it helps to obtain a more representative sample of the larger population of high school students. By including diverse schools and students, the survey results can provide more accurate and generalizable insights.

However, it is important to note that even with random sampling, there may still be some limitations, such as sampling error or non-response bias. To minimize these, it is essential to ensure that the sample size is large enough and that survey procedures are properly executed.

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the length, in inches, of the other leg of his triangle is 9. 8inches

Using the Pythagorean theorem which states that the square of the longest leg or side of a given triangle is equal to the sum of the squares of the other two sides of the triangle.

From the information given, we have that;

a² + b² = c² represents the relationship between the three sides of a right triangle

Also,

Hypotenuse side = 11 inches

One of the other side = 5 inches

Substitute the values, we have;

11² = 5² + c²

collect like terms

c² = 121 - 25

Subtract the values

c = √96

c = 9. 8 inches

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Given d = ba, we can write:

d11 = b1a1 + b2a3

d12 = b1a2 + b2a4

d21 = b3a1 + b4a3

d22 = b3a2 + b4a4

To find the product of d, we need to find the values of b and a such that d11 = d12 = d21 = d22.

Let's assume that d11 = d12 = d21 = d22 = x. Then, we have:

b1a1 + b2a3 = x

b1a2 + b2a4 = x

b3a1 + b4a3 = x

b3a2 + b4a4 = x

We can solve for b1, b2, b3, and b4 in terms of a1, a2, a3, and a4:

b1 = (x - b2a3)/a1

b2 = (x - b1a1)/a3

b3 = (x - b4a3)/a1

b4 = (x - b3a1)/a3

Substituting these values of b1, b2, b3, and b4 into the equation d = ba, we get:

d11 = x = a1(x - b1a3)/a1 + a3(x - b2a1)/a3

= x - b1a3 + x - b2a1

= 2x - (b1a3 + b2a1)

d12 = x = a2(x - b1a3)/a1 + a4(x - b2a1)/a3

= (a2/a1)x - (b1a2 + b2a4) + (a4/a3)x - (b1a4 + b2a4)

= x - (b1a2 + b2a4)

d21 = x = a1(x - b3a3)/a1 + a3(x - b4a1)/a3

= (a1/a1)x - (b3a3 + b4a3) + (a3/a3)x - (b3a1 + b4a3)

= x - (b3a1 + b4a3)

d22 = x = a2(x - b3a3)/a1 + a4(x - b4a1)/a3

= (a2/a1)x - (b3a2 + b4a4) + (a4/a3)x - (b3a4 + b4a4)

= x - (b3a2 + b4a4)

We can rewrite these equations in matrix form as:

| 2 -a3-a1 0 0 || x | | b1a3 + b2a1 |

| 0 a2 0 -a4 || | = | b1a2 + b2a4 |

| -a3-a1 0 2 -a1 || | | b3a1 + b4a3 |

| 0 -a4 -a1 2 || | | b3a2 + b4a4 |

To solve for x, we need to invert the matrix on the left and multiply it by the vector on the right:

| x | | 2 -a3-a1 0

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The probability that exactly five of the students were born on a weekend is 0.1514.

Assuming that the probability of being born on a weekend is the same for all students,

we can model the number of students born on a weekend as a binomial random variable with parameters n = 7 (number of trials) and p = 2/7 (probability of success, i.e., being born on a weekend).

The probability of exactly five students being born on a weekend can be calculated using the binomial probability formula:

P(X = 5) = (7 choose 5) * (2/7)^5 * (5/7)^2

where (7 choose 5) = 7! / (5! * 2!) is the number of ways to choose 5 out of 7 students.

Evaluating this expression gives:

P(X = 5) = (7 choose 5) * (2/7)^5 * (5/7)^2

= 21 * (0.0408) * (0.1837)

= 0.1514 (rounded to four decimal places)

Therefore, the probability that exactly five of the seven students were born on a weekend is approximately 0.1514.

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Answer:

The largest volume that such a box can have is (3/4)²(3/2)²/4 = 1.6875 m³

Step-by-step explanation:

4. Let the sides of the rectangle be 'l' and 'w', where lw = A, the fixed area. The perimeter P is given by P = 2l + 2w. To minimize P, we need to find the values of 'l' and 'w' that make P as small as possible. Solving the equation for 'w' in terms of 'l' from lw = A, we get w = A/l. Substituting this into the equation for P, we get P = 2l + 2(A/l). Taking the derivative of P with respect to 'l' and setting it to zero, we get 2 - 2A/l² = 0, which implies l = √A. Substituting this value into lw = A, we get w = √A. Therefore, a square with sides of length √A has the minimum perimeter among all rectangles with a fixed area of A.

Let the side length of the square base be 'x' and the height of the box be 'h'. Then the volume of the box is V = x²h = 400. We need to minimize the surface area S of the box, which is given by S = x² + 4xh. Solving the equation for 'h' in terms of 'x' from V = x²h, we get h = 400/x². Substituting this into the equation for S, we get S = x²+ 4x(400/x²) = x² + 1600/x. Taking the derivative of S with respect to 'x' and setting it to zero, we get 2x - 1600/x² = 0, which implies x = 10 cm. Therefore, the dimensions of the box that minimizes the amount of material used are 10 cm x 10 cm x 4 cm.

Let the side length of the square cut out from each corner be 'x', and the height of the box be 'h'. Then the volume of the box is V = x²h. The length and width of the base of the box are (3-2x) and (3-2x) respectively. We need to maximize the volume V of the box subject to the constraint that the length and width of the base are positive. Taking the derivative of V with respect to 'x' and setting it to zero, we get h = (3-2x)²/4. Substituting this into the equation for V, we get V = x²(3-2x)²/4. Taking the derivative of V with respect to 'x' and setting it to zero, we get x = 3/4 m. Therefore, the largest volume that such a box can have is (3/4)²(3/2)²/4 = 1.6875 m³

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The volume of the given sphere having radius of 4 units is 267.94 units³.

Given the radius of the sphere (r) = 4 units

To find the volume of the given sphere, we have to substitute the radius in the below volume formula of the sphere,

the volume of the sphere = 4/3 * π * r³

the volume of the given sphere = 4/3 * 3.14 * (4)³        

[π  is approximately equal to 3.14]

the volume of the given sphere = 267.94 units³

So from the above analysis, we can conclude that the volume of the sphere having 4 units radius is 267.94 units³.

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Given question is not having complete information, the complete question is written below:

What is the volume of the sphere having 4 units radius?

Answer:

It took 13 weeks for Jill to get 1275.00 in her savings account

Step-by-step explanation:First off you subtract 1275-300=975.After that you will divide 975 from 75 975÷75=13.So 13 is your final answer.

To calculate d²y/dx², we first need to find the first derivative of y, which is dy/dx. For y = 0.5x^-0.2, we can use the power rule of differentiation, which states that the derivative of x^n is n*x^(n-1). Therefore,

dy/dx = -0.1x^-1.2

To find the second derivative, d²y/dx², we need to differentiate dy/dx again. Using the power rule again, we get:

d²y/dx² = 0.12x^-2.2

This is the second derivative of y with respect to x.

In calculus, a derivative is a measure of how a function changes as its input changes. The second derivative is a measure of how the rate of change of the function itself changes as its input changes. It tells us about the curvature of the function at any given point.

In this case, we have calculated the second derivative of y, which gives us information about the rate of change of the slope of the function. If the second derivative is positive, the function is concave up (curving upward), and if it is negative, the function is concave down (curving downward). If the second derivative is zero, the function has an inflection point (a point where the curvature changes direction).

Overall, the second derivative is a powerful tool in calculus that helps us understand the behavior of functions in more detail.

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Answer:

To determine the best measure of variability for the data, we need to consider the type of data we are dealing with. In this case, the data is numerical and discrete, so the best measure of variability would be the range or the interquartile range (IQR).

The range is the difference between the maximum and minimum values in a dataset, while the IQR is the range of the middle 50% of the data. The IQR is less sensitive to outliers than the range, so it is often a better measure of variability.

To calculate the range and IQR for each player, we first need to order the data:

Player A: 1, 2, 2, 2, 3, 3, 3, 4, 8

Player B: 1, 1, 2, 2, 2, 3, 4, 4, 6

Player A has a range of 8 - 1 = 7, and an IQR of Q3 - Q1 = 4 - 2.5 = 1.5.

Player B has a range of 6 - 1 = 5, and an IQR of Q3 - Q1 = 4 - 1.5 = 2.5.

Therefore, Player B has a higher range and a higher IQR, indicating more variability in their performance. Player A has a lower range and a lower IQR, indicating greater consistency in their performance. Therefore, the answer is: Player A is the most consistent.

Answer:

Step-by-step explanation:

Let's call the two numbers x and y. We know that:

x + y = 30 (since the sum of the two numbers is 30)

We want to find the values of x and y that maximize their product, which is given by:

P = xy

To solve for x and y, we can use the fact that the sum of the two numbers is 30, so we can rewrite one of the numbers in terms of the other:

y = 30 - x

Substituting this into the equation for the product, we get:

P = x(30 - x)

Expanding this expression, we get:

P = 30x - x^2

To find the maximum value of P, we can take the derivative of this expression with respect to x and set it equal to zero:

dP/dx = 30 - 2x = 0

Solving for x, we get:

x = 15

So one of the numbers is x = 15, and the other is y = 30 - x = 15.

To confirm that this gives the maximum product, we can take the second derivative of P with respect to x:

d2P/dx2 = -2

Since the second derivative is negative, this means that the function P = 30x - x^2 has a maximum at x = 15.

Therefore, the two numbers are 15 and 15, and their product is maximized at P = 15 * 15 = 225.

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Answer: the median is 26, the first quartile is 19, and the third is 38

Step-by-step explanation:

if you count the numbers and x one by each side you will find the median which in this equation is 26, to find any first quartile you need to find the value under which 25% of data points are found when they are arranged in increasing order, to find the upper quartile you need to find the mean of the values of data point of rank.

The sale price of the product would be Birr 105.80.

If the cost of the product is Birr 92 and the company has a policy of 15% mark-up on the cost, then the sale price can be found by adding 15% of the cost to the cost itself.

To calculate this, we can use the formula:

Sale price = Cost + Mark-up

where the mark-up is 15% of the cost.

Mark-up = 15% of Cost = 0.15 * 92 = Birr 13.80

So, the sale price = Cost + Mark-up = 92 + 13.80 = Birr 105.80.

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An equation that models this relationship include the following: C. t = 5d.

In Mathematics, a proportional relationship produces equivalent ratios and it can be modeled or represented by the following mathematical equation:

y = kx

Where:

Next, we would determine the constant of proportionality (k) for the data points contained in the table as follows:

Constant of proportionality, k = y/x = t/d

Constant of proportionality, k = 5/1

Constant of proportionality, k = 5.

Therefore, the required equation is given by;

t = kd

t = 5d

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Missing information:

The question is incomplete and the complete question is shown in the attached picture.

the sequence 1, 4, 16, ... is a geometric sequence with a common ratio of 4.

what is geometric sequence ?

A geometric sequence is a sequence of numbers in which each term after the first is found by multiplying the previous term by a fixed number called the common ratio (r).

In the given question,

The sequence 1, 4, 16, ... is geometric.

To determine the common ratio, we divide any term by the previous term. For example:

The ratio between 4 and 1 is 4/1 = 4.

The ratio between 16 and 4 is 16/4 = 4.

Since the ratio is the same for any two consecutive terms, we can conclude that the common ratio is 4.

We can also verify this by using the general formula for a geometric sequence:

aₙ= a₁ * r⁽ⁿ⁻¹⁾

where aₙ is the nth term, a_1 is the first term, r is the common ratio, and n is the term number.

Using the given sequence, we have:

a₁ = 1 (the first term)

a₂ = 4 (the second term)

a₃ = 16 (the third term)

We can use these values to solve for the common ratio:

a₂ / a₁ = r

4 / 1 = r

r = 4

Therefore, the sequence 1, 4, 16, ... is a geometric sequence with a common ratio of 4.

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The shape formed by a solid intersecting with a plane, so the At level X = 3, the area of the vertical cross-section A is 108 square units.

To find the area of the vertical cross section A at the level X = 3, we need to find the equation of the circle when it is intersected by the plane X = 3.
First, let's find the value of y when X = 3 using the equation of the circle x^2 + y^2 = 36:

(3)^2 + y^2 = 36
9 + y^2 = 36
y^2 = 27
y = ±√27

Since we are dealing with a circle, there are two points on the circle at X = 3, which are (3, √27) and (3, -√27).

The distance between these two points will be the base of the triangle, which is also equal to its height (as given in the problem).

Base and height of the triangle: 2 * √27

Now we can find the area A of the vertical cross-section, which is a triangle with equal base and height:

A = 1/2 * base * height
A = 1/2 * (2 * √27) * (2 * √27)
A = 4 * 27
A = 108

So, the area of the vertical cross-section A at the level X = 3 is 108 square units.

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The measure of angle U to the nearest tenth is 39.6°

The cosine Rule says that the square of the length of any side of a given triangle is equal to the sum of the squares of the length of the other sides minus twice the product of the other two sides multiplied by the cosine of angle included between them.

C² = a²+b²-2abcosC

450² = 360²+110²+2(110)(360)cosU

202500 = 129600+ 12100+ 79200cosU

202500 = 141700+79200cosU

79200cosU = 202500-141700

79200cosU = 60800

cos U = 60800/79200

cos U = 0.77

U = 39.6°( nearest tenth)

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The time taken for $400 to amount to $650 at 6% compound interest annually is 8.33 years.

Compound interest is expressed as below:

[tex]A = P(1+\frac{r}{n})^{nt[/tex]

where A is the amount

P is principal

r is the rate of interest

n is the frequency with which interest is compounded per year

t is the time

A = $650

P = $400

r = 0.06

n = 1 because the interest is compounded annually. Thus the frequency of interest compounded per year is 1

650 = 400 [tex](1+0.06)^t[/tex]

1.625 = [tex]1.06^t[/tex]

t = 8.33 years

Thus, it takes 8.33 years for $400 to convert to $650 at 6% compound interest annually.

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The slope at the given points are -1/36 and -1/16 respectively.

Given is a function f(x) = 1/x+6 we need to find the slope of the function,

The slope of a function is given by dy/dx, therefore,
dy/dx = -1/(x+6)²

Therefore, at point (0, 1/6),

The slope = -1/(0+6)² = -1/36

At point (-2, 1/4),

The slope = -1/(-2+6)² = -1/16

Hence the slope at the given points are -1/36 and -1/16 respectively.

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The center of the circle lies on the x-axis, the standard form of the equation is (x – 1)² + y² = 3, and the radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.

Explanation:

We can rewrite the given equation as (x - 1)² + y² = 9 using completing the square method.

(x² - 2x + 1) + y² - 1 - 8 = 0

(x - 1)² + y² = 9

This is the standard form of the equation of a circle with center (1,0) and radius 3. Therefore, the center lies on the x-axis, and the radius is 3 units.

The circle whose equation is x² + y² = 9 is the equation of a circle with center (0,0) and radius 3, which has the same radius as the given circle.

Answer:

17.5 feet

Step-by-step explanation:

The picnic are shortest side is 5 units long on the scale drawing

Since each unit on the scale drawing is 1 inch, the shortest side length on the drawing is 5 inches

Each inch on the drawing corresponds to an actual size of 3.5 feet

Therefore 5 inches corresponds to 5 x 3.5ft = 17.5 feet

Therefore the actual length of the shortest side of the picnic area is 17.5 feet

The 95% confidence interval is: b) -1.38 to d) 3.44.

The value of the sample mean difference is 1.74, which falls:

b) within.

Here, we have to determine the 95% confidence interval for the difference of sample means and complete the statements, we need to use the sample mean difference provided and the confidence interval limits given as options.

We'll compare the sample mean difference to the interval to see if it falls within or outside the interval.

Given that the sample mean difference is 1.74, let's analyze the options:

Options for the confidence interval limits:

Lower limit options:

a) -1.26

b) -1.38

c) -3.48

d) -3.44

Upper limit options:

a) 1.26

b) 3.48

c) 1.38

d) 3.44

Since the sample mean difference is 1.74, we need to check if it falls within the interval formed by the lower and upper limits.

Looking at the options for the lower limit, the closest value to 1.74 is -1.38, and the closest value to the upper limit is 3.44.

So, the 95% confidence interval would be:

-1.38 to 3.44

Now, completing the statements:

The 95% confidence interval is: b) -1.38 to d) 3.44

The value of the sample mean difference is 1.74, which falls:

b) within

So, the completed statements are:

The 95% confidence interval is -1.38 to 3.44.

The value of the sample mean difference is 1.74, which falls within the 95% confidence interval.

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The correlation coefficient (r) for the given data points is approximately 0.9859, indicating a strong positive relationship between the x and y values.

1. First, let's find the mean of the x-values and the y-values. To do this, add all the x-values together and divide by the total number of points (9). Repeat this for the y-values.
Mean of x = (65 + 71 + 79 + 80 + 86 + 86 + 91 + 95 + 100) / 9 ≈ 83.67
Mean of y = (102 + 133 + 144 + 161 + 191 + 207 + 235 + 237 + 243) / 9 ≈ 183.89

2. Next, calculate the deviations of each point from the mean for both x and y.
For example, for the first point (65,102), the deviations are:
x-deviation = 65 - 83.67 ≈ -18.67
y-deviation = 102 - 183.89 ≈ -81.89

3. Then, multiply the x and y deviations for each point and sum the results. Also, square the deviations for both x and y and sum them separately.
Sum of x*y deviations ≈ 47598.73
Sum of squared x deviations ≈ 2678.89
Sum of squared y deviations ≈ 105426.56

4. Finally, calculate the correlation coefficient (r) by dividing the sum of x*y deviations by the square root of the product of the sum of squared x and y deviations.
r = (47598.73) / √(2678.89 * 105426.56) ≈ 0.9859

The correlation coefficient (r) for the given data points is approximately 0.9859, indicating a strong positive relationship between the x and y values.

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Statement #3 is incorrect. To correct the statement:

The box plot does not provide information on the number of days of data collected.

The box plot, also known as a box-and-whisker plot, is a graphical representation of the distribution of a dataset. It displays information about the median, quartiles, and possible outliers.

However, the box plot itself does not directly provide information on the number of days of data collected.

The main components of a box plot include:

Median: This is the line inside the box that represents the middle value of the dataset. It divides the dataset into two equal halves, with 50% of the data falling below the median and 50% above it.

Quartiles: The box in the plot represents the interquartile range (IQR) of the data. The lower edge of the box corresponds to the first quartile (Q1), which is the 25th percentile. The upper edge of the box corresponds to the third quartile (Q3), which is the 75th percentile. The IQR represents the range of the middle 50% of the data.

Whiskers: These are the lines extending from the box. Typically, the whiskers extend to the smallest and largest observations within a certain range, often 1.5 times the IQR. Values outside this range are considered potential outliers and are represented as individual points beyond the whiskers.

The box plot can provide valuable information about the spread, skewness, and potential outliers in a dataset. However, it does not directly convey information about the number of days of data collected. To determine the number of days, one would need to refer to the raw data or other accompanying information.

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The limit of (69²-24) as x approaches infinity is equal to infinity.

As x approaches infinity, the value of (69²-24) becomes very large, and it goes to infinity. Therefore, the limit of (69²-24) as x approaches infinity is infinity.

B) The limit of (4a+2)/(2-a) as a approaches 2 from the left is equal to -6 and as a approaches 2 from the right is equal to 6.

As a approaches 2 from the left, the denominator (2-a) approaches zero from the negative side, and the numerator (4a+2) approaches -6. Therefore, the limit of (4a+2)/(2-a) as a approaches 2 from the left is -6.

As a approaches 2 from the right, the denominator (2-a) approaches zero from the positive side, and the numerator (4a+2) approaches 6. Therefore, the limit of (4a+2)/(2-a) as a approaches 2 from the right is 6.

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