The frequency of people compared to the number of monthly text messages sent and received by a class are shown in the histogram.


A histogram titled Daily Text Messages. The x-axis is labeled Number of Sent Texts and has intervals of 1 to 15, 16 to 30, 31 to 45, 46 to 60, 61 to 75, 76 to 90, and 91 to 105. The y-axis is labeled Frequency and starts at 0, with tick marks every 2 units up to 12. There is a shaded bar for 1 to 15 that stops at 1, for 31 to 45 that stops at 3, for 46 to 60 that stops at 4, for 61 to 75 that stops at 4, for 76 to 90 that stops at 5, and for 91 to 105 that stops at 8. There is no shaded bar for the 16 to 30 interval.


Which of the following best describes the shape of the data, and why?


The data is symmetric because the majority of students sent fewer than 45 text messages.

The data is symmetric because some students have phones and some do not.

The data is skewed because most text messages are replied to and cause the number to be at least twice what it was originally.

The data is bimodal because the popular number of text messages to send is between 91 and 105.

If random sample yielded these observed scores: 6 12 5 10 6 9 12 20 5 23 10 20 11 28 13 18. The 99% confidence interval for the mean height of both groups combined is approximately (3.92, 20.58) cm.

To calculate the 99% confidence interval for the mean height of both groups combined, we can use the t-distribution, since the sample size is relatively small (less than 30) and the population standard deviation is unknown.

First, we need to calculate the sample mean and sample standard deviation. The sample mean can be calculated by adding up all the observed scores and dividing by the total number of scores. In this case, the sample mean is (6+12+5+10+6+9+12+20+5+23+10+20+11+28+13+18) / 16 = 12.25 cm.

The sample standard deviation can be calculated using the formula:

s = √((∑(x - x')^2) / (n - 1))

where x is each observed score, x' is the sample mean, and n is the sample size. In this case, the sample standard deviation is approximately 7.05 cm.

Next, we need to calculate the t-value for a 99% confidence level, with 15 degrees of freedom (16 - 1). Using a t-table or a statistical software, we can find that the t-value is approximately 2.947.

Finally, we can calculate the confidence interval using the formula:

Confidence interval = sample mean ± (t-value * (sample standard deviation / √(sample size)))

Plugging in the values, we get:

Confidence interval = 12.25 ± (2.947 * (7.05 / √(16))) = 12.25 ± 8.33

In summary, to calculate the 99% confidence interval for the mean height of both groups combined, we can use the t-distribution and the formula for confidence intervals. We need to calculate the sample mean, sample standard deviation, t-value for the desired confidence level, and then plug these values into the formula to get the confidence interval.

This interval represents the range of values within which we can be 99% confident that the true mean height of both groups combined falls.

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The volume of the sphere with a radius of 8.9 m is given as follows:

V = 2,951.5 m³.

The volume of a sphere of radius r is given by the equation presented as follows:

V = 4πr³/3.

The radius for this problem has the measure given as follows:

r = 8.9m.

Hence, considering that π is rounded to 3.14, the volume of the sphere is obtained as follows:

V = 4 x 3.14 x (8.9)³ x 1/3

V = 2,951.5 m³.

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The probability of Shawna bowling a perfect game is 7.23%.

Assuming that Shawna's chance of getting a strike is independent on each roll (which may not be entirely accurate in real life), the probability of her getting a strike on any given roll is 0.75.

To calculate the probability of Shawna bowling a perfect game (i.e., getting a strike on all 12 rolls), we can use the multiplication rule of probability, which states that the probability of two independent events occurring together is the product of their individual probabilities.

So, the probability of Shawna getting a strike on the first roll is 0.75. The probability of her getting a strike on the second roll, assuming she got a strike on the first roll, is also 0.75. Similarly, the probability of her getting a strike on the third roll, assuming she got strikes on the first two rolls, is also 0.75. We can continue this pattern for all 12 rolls.

Therefore, the probability of Shawna bowling a perfect game is:

0.75 x 0.75 x 0.75 x ... (12 times)

which is approximately equal to 0.0723, or about 7.23%.

Using a computer to randomly generate 12 numbers from 1 to 4 and treating 1, 2, or 3 as a strike is a reasonable way to simulate the situation and estimate the probability of Shawna bowling a perfect game. By repeating this process many times, we can get a better idea of the distribution of possible outcomes and the likelihood of different results.

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The equivalent solution to the equation is (-1, -2)

Given the simultaneous equation below:

Y=2x+4

y=-x+1

Since both equations are y expressions, we will equate then to have;

2x+ 4 = -x + 1

2x + x = 1 - 4

3x = -3

x = -1

For the value of y;

y = -x + 1

y = -1-1

y =-2

Hence the solution to the system of equation is (-1, -2)

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The slope of this line is 0.35, which represents the amount that the cost increases for each additional click.

What is equation of straight line ?

Equation of straight line can be as follows, y = mx +b

where m is a slope of line.

Given,

To find , The cost, C, in dollars for advertising on a social networking website is proportional to the number n] of clicks on the advertisement.

When a business is charged $108.50 for 310 clicks on its advertisements.

The cost, C, and number of clicks, n, are related by the equation

C = k * n, where k is the constant of proportionality.

From the given information, we know that C = $108.50 when n = 310. We can use this information to find the value of k:

$108.50 = k * 310

Solving for k:

k = $108.50 / 310

k = $0.35

So, the equation for the relationship between cost and clicks is:

C = $0.35 * n

Therefore, The slope of this line is 0.35, which represents the amount that the cost increases for each additional click.

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Answer:

1. not a function

Since x=5 produces y=9 and y=0, it can't be a function

2. it is a function because there is one value of y for every value of x

3. A circle is not a function. because it doesn't pass the vertical line test

4. I think is d but not sure has been a while since I have done these questions so sorry if I am wrong :)

Step-by-step explanation:

have a nice day and good luck

The total amount accrued, principal plus interest, with compound interest on a principal of $ 1,500.00 at a rate of 4.9 % per year compounded 1 times per year over 10 years is $2,420.17.

Using the compound interest formula is

Compound interest is calculated by multiplying the initial principal amount (P) by one plus the annual interest rate (R) raised to the number of compound periods (nt) minus one.

A= Total amount =?

P= Principal amount = 1500

r=Rate of interest =4.9 %=0.049

t= time =10years

n= compounding = annually =1

Using the above data and formula, we get:

First, convert R as a percent to r as a decimal

[tex]& \mathrm{r}=\frac{\mathrm{R}}{100} \\[/tex]

[tex]& \mathrm{r}=\frac{4.9}{100} \\[/tex]

[tex]& \mathrm{r}=0.049 \text { rate per year, }[/tex]

Then solve the equation for A

[tex]& \mathrm{A}=1,500.00\left(1+\frac{0.049}{1}\right)^{(1)(10)} \\[/tex]

[tex]& \mathrm{A}=1,500.00(1+0.049)^{10} \\[/tex]

[tex]& \mathrm{~A}=\$ 2,420.17[/tex]

The total amount accrued after 10 years is $2,420.17.

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Answer:

Step-by-step explanation:

The stock price of Company A decreased by $1.27 for 4 days, so the total decrease in the stock's price would be $1.27 * 4 = $5.08.

On the fifth day, the stock price increased by $3.47, so the total change in the stock's price over 5 days would be $3.47 - $5.08 = -$1.61.

So the total change in the stock's price over 5 days was a decrease of $1.61.

The equation of the quadratic function is x² + x - 6

Note that functions are equations, laws or expressions showing the relationship between two variables.

These variables are;

From the information given, we have that;

x = 2 and  = -3 are the roots

Then,

(x -2)(x + 3)

expand the bracket, we get;

x² + 3x - 2x - 6

collect the like terms, we have;

x² + x - 6

Hence, the equation is x² + x - 6 = 0

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The standard deviation of the population is approximately 11.8 ounces.

Statistics is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data.

The formula to find the standard deviation is given

σ = √( Σ(x - μ)² / N )

where  μ is the mean.

μ = (94 + 113 + 93 + 123 + 93 + 102) / 6 = 100

Next, we can calculate the deviations of each value from the mean:

94 - 100 = -6

113 - 100 = 13

93 - 100 = -7

123 - 100 = 23

93 - 100 = -7

102 - 100 = 2

σ = √( -6)²+( 13)²+( -7)²+( 23)² +( -7)²+( 2)²/ 6 )

=√36+169+49+529+49+4/6

=√836/6=11.8

Hence, the standard deviation of the population is approximately 11.8 ounces.

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Using the unitary method, we find that the store created approximately 37 bags with 15 random cards in each bag.

This problem can be solved using the unitary method. It is given that the

number of Anniversary cards is 163,

number of Birthday cards is 258,

number of Get Well cards is 98

and the number of Thank you cards is 47

So, the total number of cards will be equal to the sum of all these cards, that is,

163+258+98+47

= 566 cards

To create bags of 15 random cards, we have to divide the total number of cards by 15  which gives,

566/15 = 37.734

Thereby, we can say that the store created approximately 37 bags with 15 random cards in each bag.

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The initial number of points earned when signing up is 30 and earned per pair of shoes purchased is 15.

Let the equation of the line pass through (x₁, y₁) and (x₂, y₂). Then the equation of the line is given as,

[tex]\rm (y - y_2) = \left (\dfrac{y_2 - y_1}{x_2 - x_1} \right ) (x - x_2)[/tex]

Let 'x' be the number of shoes purchased and 'y' be the total points earned.

From the graph, the two points are (2, 60) and (4, 90). Then the equation is given as,

[tex]\rm (y - 60) = \left (\dfrac{90 - 60}{4 - 2} \right) (x - 2)[/tex]

y - 60 = 15(x - 2)

y - 60 = 15x - 30

y = 15x + 30

The initial number of points earned when signing up is 30 and earned per pair of shoes purchased is 15.

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After 1 week of tutoring and babysitting, Jeremy and Mary will have saved the same amount of money ($28).

Let's start by defining some variables:

We can then use this information to set up two equations that represent how much money each person has saved:

J = 20j + 8

M = 18m + 26

We want to know when J and M are equal, so we can set these equations equal to each other:

20j + 8 = 18m + 26

We can simplify this equation by subtracting 8 from both sides:

20j = 18m + 18

Then, we can divide both sides by 2 to simplify the equation further:

10j = 9m + 9

We want to find the smallest values of j and m that make this equation true. We can start by trying j = 1 and then incrementing j until we find a value that makes the right-hand side of the equation (9m + 9) divisible by 10. We can then solve for m and check that the left-hand side of the equation (10j) is equal to the same value.

If we try j = 1, we get:

10(1) = 9m + 9

Simplifying this equation gives us:

m = 1

So, if Jeremy tutors his cousin for 1 week and Mary babysits her sister for 1 week, they will both have the same amount of money saved. We can check this by plugging j = 1 and m = 1 into the original equations for J and M:

J = 20j + 8 = 20(1) + 8 = 28

M = 18m + 26 = 18(1) + 26 = 44

So, after 1 week of tutoring and babysitting, Jeremy and Mary will have saved the same amount of money ($28).

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The graph of the linear inequality y > -4  is given below.

Linear inequalities are expressions that use inequality symbols to compare two linear expressions. When a polynomial of degree 1 is contrasted with another algebraic expression of a degree less than or equal to 1, this comparison results in a linear inequality, which is an inequality including at least one linear algebraic expression. There are many different ways to represent different types of linear inequalities.

Given linear inequality is y > -4 which represents y region will be in the positive range or greater than -4.

The graph of this linear inequality is given below.

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Answer: 54

Step-by-step explanation:

Answer:

AC = 16 cm

Step-by-step explanation:

given a tangent and a secant from an external point to the circle, then

the square of the measure of the tangent is equal to the product of the measures of the secant's external part and the entire secant, that is

AB × AC = AD²

4x = 8² = 64 ( divide both sides by 4 )

x = AC = 16 cm

Answer:

16 cm

Step-by-step explanation:

tan/sec Theorem

a² = b(b+c)

8² = 4(4+c)

64 = 16 + 4c

48 = 4c

12 = c

12 + 4 = 16 cm

Answer:

It would equal 2/5. First flip the 5/6 so then it would be 6/5. Then the 3 and 6 can cross cancel so it would equal to 2 in the numerator.

Answer:

The answer is -8

Step-by-step explanation:

[tex]2x+y=4\\x-y=5\\\\[/tex]

after combining these into a singular equation, we get:

[tex]3x=9\\x=3[/tex]

substitute the value of [tex]x[/tex] into one of the equations:

[tex]x-y=5\\3-y=5\\y=-2[/tex]

now that we found the [tex]x[/tex] and [tex]y[/tex] value, we can substitute it into the term [tex]b^a[/tex] since we know that [tex]x=a[/tex] and [tex]y=b[/tex].

[tex]a^b\\a=x, b=y\\x=3, a=3\\y=-2, b=-2\\-2^3\\-8[/tex]

If the height of seven and three fourths yards and a base of 20 yards, then the area of the right triangle is 77.5 square yards.

To calculate the area of a right triangle, we can use the formula:

Area = (base * height) / 2

where the base is one of the sides of the triangle, and the height is the perpendicular distance from that side to the opposite vertex.

In this case, the height of the right triangle is 7 and 3/4 yards, and the base is 20 yards. Plugging these values into the formula, we get:

Area = (20 * 7.75) / 2 = 155 / 2 = 77.5 square yards

In summary, to calculate the area of a right triangle, we can use the formula that relates the base and height to the area. In this case, we needed to use the given values of the height and base of the right triangle to compute the area in square yards.

The resulting area represents the amount of surface inside the triangle and is useful in many applications, such as geometry, physics, and engineering.

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The initial investment cost using the equity method would be:

Investment account balance + Phillips' share of retained earnings = Initial investment cost = $54,000 + $10,400 = $64,400

Fair Value Method:

The cumulative increase in fair value over the three years would be:

$2,000 + $2,000 + $2,000 = $6,000

Therefore, the initial investment cost would be:  

$54,000 - $6,000 = $48,000

Equity Method:

By the equity method, Phillips would have recorded its share of Jones Bag's earnings each year, as well as its share of dividends received. Phillips' share of Jones Bag's earnings and dividends would be based on its 40% ownership interest.

Phillips' share of Jones Bag's earnings and dividends would be as following:

Year Earnings Dividends

20X1 $3,200 $6,000

20X2 $4,800 $4,000

20X3 $8,000 $4,000

$40,000 - $14,000 = $26,000

Phillips' share of retained earnings would be 40% of $26,000, or $10,400.

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Using the normal curve to estimate the following percentages. The answer that is closes to being correct is 39.4%. So, the correct answer is C.

Since the distribution is approximately normal, we can use the empirical rule (also known as the 68-95-99.7 rule) to estimate the percentages.

a. 10.6%: This corresponds to the area under the curve that is more than 2 standard deviations below the mean. Using the rule, we know that about 2.5% of the area under the curve is more than 2 standard deviations below the mean. So 10.6% is too high. The answer is not a.

b. 89.4%: This corresponds to the area under the curve that is less than one standard deviation above the mean. Using the rule, we know that about 68% of the area under the curve is within one standard deviation of the mean. So 89.4% is too high. The answer is not b.

c. 39.4%: This corresponds to the area under the curve that is within one standard deviation of the mean. Using the rule, we know that about 68% of the area under the curve is within one standard deviation of the mean. So 39.4% is the closest to being correct. The answer is c.

d. 78.8%: This corresponds to the area under the curve that is less than two standard deviations above the mean. Using the rule, we know that about 95% of the area under the curve is within two standard deviations of the mean. So 78.8% is too high. The answer is not d.

e. 68.27%: This corresponds to the area under the curve that is within one standard deviation of the mean. This is the same as c. So e is not the correct answer.

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Probability 8 2/ 7 3=1.123 that the team lost a game if it played at lincoln park.

One of the areas of probability theory is the estimation of the chance of experiments occurring. Using a probability, we can calculate everything from the likelihood of getting heads or tails when flipping a coin to the likelihood of making a research error, for example. It is essential to appreciate the most basic definitions of this branch, such as the formula for computing probabilities in equiprobable sample spaces, the likelihood of two events joining together, the probability of the complementary event, etc., in order to properly understand it .Probability refers to potential. A random event's occurrence is the subject of this area of mathematics. Mathematics has incorporated probability to forecast the likelihood of various events.

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The average of the middle two figures, which are 18 and 19, is the median of the lower half. Q1 = (18+19)/2, which equals 18.5. The average of the middle two values—32 and 32—represents the median of the upper half. Q3 = (32+32)/2 = 32 as a result.

Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting or ending position.

First, we calculate the median for the lower and higher halves of the data. The values up to the median are found in the lower half and are as follows:

9, 12, 18, 18, 19, 20, 26, 28

The upper half consists of the values from the median onwards, which are:

29, 31, 31, 32, 32, 34, 35, 37

The median of the lower half is the average of the middle two values, which are 18 and 19. Therefore,

Q1 = (18+19)/2

= 18.5.

The median of the upper half is the average of the middle two values, which are 32 and 32. Therefore,

Q3 = (32+32)/2

= 32.

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Answer: 8.8 moles

Step-by-step explanation:

Fun Fun! Chemistry :)

So, 5.3 x [tex]10^{24}[/tex] atoms can be converted to moles by dividing by Avogadros number, (6.02 x 10^23). This is because Avogadros number of atoms form one mole.

So the answer is about 8.8 moles of Kr

In mathematics, a line is a set of points that extend indefinitely in two directions.

Points on the line: These are points that lie exactly on the line. They are equidistant from the two endpoints of the line and are considered to be part of the line itself.

Points above the line: Points that are vertically above the line are referred to as points above the line. These points are located higher than the line and have a greater y-coordinate than any point on the line.

Points below the line: Points that are vertically below the line are referred to as points below the line. These points are located lower than the line and have a smaller y-coordinate than any point on the line.

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Kim saved $9 by using the coupon.

How to find Original price?

The MSRP (i.e., Manufacturer's Suggested Retail Price) set the original price, which is the cost. In the majority of cases, the original price would have been less expensive than the current price, though this is not always the case. Finding an item's original price and knowing the price after a discount are both made possible by original price.

Original price = Sales price/(100%-Discount%)

To find out how much money Kim saved, we need to first find out how much the birdhouse cost after the coupon was applied.

The coupon took 25% off the original price, so the birdhouse cost 100% - 25% = 75% of its original price.

So, the new price of the birdhouse would be:

36 * 75% = $27

Kim saved 36 - 27 = $9 by using the coupon.

Therefore, Kim saved $9 using the coupon.

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