The radius of Circle A is 6 cm. The radius of Circle B is 3 cm greater than the radius of Circle A. The radius of Circle C is 3 cm greater than the radius of Circle B. The radius of Circle D is 2 cm less than the radius of Circle C. What is the area of each​ circle? How many times greater than the area of Circle A is the area of Circle D​?

Answer:

d=1/5

Step-by-step explanation:

Answer: d=2/5

Step-by-step explanation:

a. f(x) = 0.75x.

b. g(x) = x - 5.

c. f(50) = 0.75×50 - 5 ⇒ f(50) = 32.5.

d. Yes, The order in which the adjustments are taken does make a difference.

A percentage is a value per hundredth. Percentages can be converted into decimals and fractions by dividing the percentage value by a hundred.

Given, A department store has marked down its merchandise by 25%. It later decreases by $5 the price of items that have not sold.

Let, 'x' be the price of the merchandise.

Therefore, After 25% mark down it would be (75/100)×x = 0.75x and a $5 decrease would be (- $5).

a. A function f(x) to represent the price after the 25% markdown is,

f(x) = 0.75x.

b. A function g(x) to represent the price after the $5 markdown is,

f(x) = x - 5.

c. A composition function to find the price of a $50 item after both price adjustments is f(50) = 0.75x - 5.

f(50) = 0.75×50 - 5.

f(50) = 37.5 - 5.

f(50) = 32.5.

d. It would make a difference, Let's assume the price is $100,

Then a 25% markdown would be $75 and with a decrease of $5 the final price would be $70.

Again, Assuming the price to be $100, 5$ decrease is $95 and 75% of $95 is 0.75×95 = $71.25.

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Answer:

13

Step-by-step explanation:

26/2

Answer:

Jake and Sam each can pick 13 presents

Step-by-step explanation:

Since they have 26 presents and they want to spilt them evenly we can use the Average

Mean = 26/2 = 13

Jake and Sam each can pick 13 presents

The correct option is (D). On average, the number of breakdowns per day varies from the mean by about 0.28.

Because standard deviation represents the typical distance between each data point and the mean.

The average distance between each data point and the mean is known as the mean absolute deviation of a dataset. It offers us a sense of how variable a dataset is.

So, the correct answer is On average, the number of breakdowns per day varies from the mean by about 0.28.

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Answer:

4:9

Step-by-step explanation:

To find the ratio of males to the total number of people present, we need to divide the number of males by the total number of people.

The total number of people present is the sum of the number of females and the number of males:

Total = 125 females + 100 males = 225 people

So the ratio of males to the total number of people present is:

100 males / 225 people

To simplify this ratio, we can divide both the numerator and denominator by the greatest common factor, which is 25.

So the simplified ratio is:

100/225 = 4/9

So the ratio of males to the total number of people present is 4:9

Answer:

The answer is 24 inches

Step-by-step explanation:

The number line that best represents all the possible numbers of games in which Jana scored 2 goals this season is given by the

Second number line.

To obtain the number line, we must first obtain the inequality that represents the problem.

This hockey season, she scored 0 goals in 22 games, 1 goal in each of 16 games, and 2 goals in each of the remaining games, hence her total number of goals is given as follows:

16 + 2x.

In which x is the number of games that she scored 2 goals.

She scored less than 29 goals, hence the inequality is given as follows:

16 + 2x < 29

2x < 13.

x < 6.5.

The number of games is a discrete amount, meaning that the possible amounts are given as follows:

x = 0, 1, 2, 3, 4, 5 and 6.

Thus the second number line is the correct number line.

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Answer: 0

Step-by-step explanation:

Step 1: Substitute the a as 6.

Step2: 5*(a) =5*6, which equals 30

Step 3: 5(6) - 30= 0

Answer:

The graph that shows the solution to the system of linear inequalities is the one that has a line with a slope of -2 and y-intercept of 1/2, and another line with a slope of 1 and y-intercept of 1/2. The region of the plane that lies between the two lines and satisfies both inequalities is the solution set.

The slope of the linear qeuation is -1/4 = -0.25

A general linear equation can be written as:

y = a*x + b

Where a is the slope and b is the y-intercept.

Remember that if a line passes through (x₁, y₁) and (x₂, y₂) the slope will be:

a = (y₂ - y₁)/(x₂ - x₁)

We can see the points (0, 1) and (4,0). Then the slope is:

a = (0 - 1)/(4 - 0) = -1/4

The slope is -1/4.

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As per the probability the equation of E[X] = 2 * P(X=2) + 3 * P(X=3) + ... + 10 * P(X=10)

A die is a cube-shaped object with six faces numbered from 1 to 6. Each face has an equal chance of landing face up when the die is rolled. When you roll a die, you are randomly selecting one of the six numbers.

Let's first calculate the probability that X is equal to 2. To do this, we need to consider two cases:

The first case is when N = 2. In this case, there is only one way to select 2 tags, both with the number 2.

The second case is when N is greater than 2. In this case, there are 9 ways to select the first two tags, both with the number 2. The rest of the tags can be selected in any order.

The probability that X is equal to 2 can be calculated as follows:

P(X=2) = (1/45) + (9/45 * (9/44) * (8/43) * ... * ((10-N+1)/(10-N+2)))

Next, we calculate the expected value of X. The expected value of X is calculated as follows:

E[X] = sum of (each value of X multiplied by its probability)

E[X] = 2 * P(X=2) + 3 * P(X=3) + ... + 10 * P(X=10)

The expected value of X gives us an idea of the average value of X over many trials of rolling the die and selecting the tags.

In conclusion, the probability that X is equal to 2 is calculated by considering two cases, and the expected value of X is calculated by summing up each value of X multiplied by its probability.

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Answer:

(9-1) · 3 ÷ 7 + 5

Step-by-step explanation:

(9-1) · 3 ÷ 7 + 5

8 · 3  ÷ 7 + 5

24 ÷ 7 + 5

[tex]\frac{24}{7}[/tex] + 5

[tex]\frac{24}{7}[/tex] + [tex]\frac{35}{7}[/tex]

[tex]\frac{59}{7}[/tex]

Answer:

He should buy 4 pounds of chocolate candies and 4 pounds of bubble gum.

Step-by-step explanation:

1.50x4 (4 pounds) equals = $6

2.90x4 (4 pounds) equals = $11.6

$11.6 + $6 = $17.6

Hope this helps! <3 (so sorry if this is wrong :C)

The correct answer is  [78.2, 82.3].

It is a statistical quantity that provides information about how far the individual values in a data set deviate from the mean (average) value.

The standard deviation is calculated by finding the square root of the variance, which is the average of the squares of the deviations of each value in the data set from the mean. The formula for standard deviation is:

σ = [tex]\sqrt{ \frac{1}{n}[/tex] × Σ ([tex]x_{i}[/tex] - μ)²

where:

σ is the standard deviation,

n is the number of values in the data set,

[tex]x_{i}[/tex] is each value in the data set,

μ is the mean of the data set,

Σ ([tex]x_{i}[/tex] - μ)² is the sum of the squares of the deviations of each value from the mean.

To calculate the 95% confidence interval for the population mean, we need to know the population standard deviation. Since we don't have that information, we will use the sample standard deviation as an estimate.

Using the sample data, the sample mean is 80.25 and the sample standard deviation is 2.83.

The 95% confidence interval for the population mean is calculated as follows:

CI = [tex]\bar x[/tex] ± t×[tex]\frac{s}{\sqrt{n} }[/tex]

where:

[tex]\bar x[/tex] = sample mean = 80.25

s = sample standard deviation = 2.83

t = t-statistic for a 95% confidence level with 11 degrees of freedom (n-1)

n = sample size = 12

Using a t-table, the t-statistic for a 95% confidence level with 11 degrees of freedom is 2.201.

CI = 80.25 ± 2.201 × [tex]\frac{2.83}{\sqrt{12} }[/tex]

CI = 80.25 ± 2.201 × 0.913

CI = 80.25 ± 2.006

CI = (78.24, 82.26)

Rounding off to the nearest tenth, the 95% confidence interval for the population mean is [78.2, 82.3].

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The complete question is:

Answer: 2.49

Step-by-step explanation:

$2.00 is an automatic fee, so this is our y-intercept.

$4.98 for every two meals, so if we divide that by two, we get the price for one meal, which is $2.49.

Step-by-step explanation:

n (TUB)=100-20

=80

from formula,

80 = x (x-5)+x+2x

80= x^2-5x+3x

80=x^2-2x

x^2-2x-80=0

x^2-10x+8x-80=0

x(x-10)+8 (x-10)=0

(x+8)(x-10)=0

either,

x+8=0

×=-8 (neglected)

Or,

x-10=0

×=10

As segments MN and QR are parallel, the correct statement regarding the triangles is given as follows:

PM/PQ = PN/PR.

The theorem used to solve this problem is given as follows:

A line parallel to one side of a triangle divides the other two proportionately.

The parallel segments are given as follows:

MN and QR.

Hence the segments that have proportional length are given as follows:

PQ and PQ.

As these segments are divided by segment MN, the proportional relationship is given as follows:

PM/PQ = PN/PR.

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To find the other 2 sides of the right triangle with the given hypotenuse using Pythagorean theorem we use A² = B² + C²

According to the Pythagoras theorem, the square of the hypotenuse of a triangle, which has a straight angle of 90 degrees, equals the sum of the squares of the other two sides. Look at the triangle ABC, where

BC² = AB² + AC² is present. The base is represented by AB, the altitude by AC, and the hypotenuse by BC in this equation. It should be remembered that a right-angled triangle's hypotenuse is its longest side.

The formula for the Pythagoras theorem is written as c² = a² + b², where c is the hypotenuse of the right triangle and a and b are its other two legs. As a result, the Pythagoras equation can be used to any triangle that has one angle that is exactly 90 degrees to create a Pythagoras triangle.

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Step-by-step explanation:

We know that the water level in the tank is 15 cm initially, and after 2 days it has dropped to 14 cm. Therefore, the water level is dropping by 1 cm per day. To find out when the water will run out, we need to know how many days it will take for the water level to drop to 0 cm.

To find this out, we can use the following formula:

Days = (Initial water level - Final water level) / Rate of evaporation per day

Plugging in the values, we get:

Days = (15 - 0) / 1 = 15 days

So, the water will run out in 15 days.

Answer:

Step-by-step explanation:

The equation 25d^3 + 210d^2 - 640 = 0 can be reduced to a quadratic equation by using the factor theorem:

(d - 8)(25d^2 + 182d + 80) = 0

So, one root of the equation is d = 8. To find the other two roots, you can solve the quadratic equation:

25d^2 + 182d + 80 = 0

Using the quadratic formula, the roots can be calculated as:

d = (-b ± √(b^2 - 4ac)) / 2a

Where a = 25, b = 182, and c = 80.

So,

d = (-182 ± √(182^2 - 4 * 25 * 80)) / 2 * 25

d = (-182 ± √(33124 - 8000)) / 50

d = (-182 ± √(25124)) / 50

d = (-182 ± 158) / 50

Therefore, the roots of the equation are:

d = (-340 + 158) / 50 = (-182 + 158) / 50 = (-24) / 50 = -0.48

d = (-340 - 158) / 50 = (-182 - 158) / 50 = -340 / 50 = -6.8

So, the solutions to the equation are d = 8, -0.48, and -6.8.

An event has one outcome or collection of outcomes.

An event in probability is a set of one or more outcomes from a sample space, which is a set of all possible outcomes of a random experiment.

An event represents a situation or condition of interest in a random experiment.

The event can have one outcome or multiple outcomes, and it can be either simple (consisting of a single outcome) or compound (consisting of multiple outcomes).

For example, the event of rolling a six on a single die is a simple event with one outcome

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The length of the hypotenuse for all the right-angled triangles are found using trigonometric functions.

What is the hypotenuse?

The longest side of a right-angled triangle, or the side opposite the right angle, is known as the hypotenuse in geometry. The Pythagorean theorem, which asserts that the square of the length of the hypotenuse equals the sum of the squares of the lengths of the other two sides, can be used to determine the length of the hypotenuse.

11) when angle = 30°

 perpendicular = 3

sin 30 = perpendicular/ hypotenuse

0.5 = 3/hypotenuse

hypotenuse = 6

12) sin 30 =perpendicular/ hypotenuse

  0.5 = 8/ hypotenuse

hypotenuse = 16

13) sin 60 = 11√3 / x

   Hypotenuse = x = 11√3/ sin 60 = 11√3 / (√3/2) = 22

14) sin 30 = perpendicular/ hypotenuse

   0.5 = 9/x

x = 18

15) cos 60 = base/ hypotenuse

     0.5 = 1 /x

     x = 2

16) sin 60 = 12√3/x

   √3/2 = 12√3/x

  Hypotenuse = x = 24

Therefore the length of the hypotenuse for all the right-angled triangles are found.

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Answer:

0.00576

Step-by-step explanation:

The "Markdown%" is defined by RICS and the majority of the retail business as "Markdown dollars divided by Sales."

Establish the markdown. Subtract the actual selling price from the difference in pricing. After that, multiply this outcome by 100. The outcome is a percentage markdown.

Here,

The "Markdown%" is defined by RICS and the majority of the retail business as "Markdown dollars divided by Sales." The dollar discount is divided by the NET retail sales price to determine the markdown percentage (times 100). As an illustration, a

=>  $30 item is reduced to $24 and sold.

=> The markdown percentage is 25% ($6/$24).

=> Original Sales Price X (100% minus Markdown Percentage)

=>  New Sales Price Paid Percentage=  Discount Percent is 10%

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The number of bystanders would be least likely to affect your decision about the number of additional resources needed at the scene.

The number of injured persons, evidence of any hazards, and the nature of the illness are all factors that should be taken into consideration when determining the additional resources needed.

Probability and statistics are two closely related branches of mathematics that are used to analyze and make predictions about the behavior of random phenomena.

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Dataset 1:

Range = 21

Variance: = 150.33

Standard deviation: = 12.37

Dataset 2:

Range: = 5.6

Variance: = 1.44

Standard deviation: = 1.2

Variance is a measure of dispersion that, in contrast to range and interquartile range, accounts for the spread of all data points in a data collection. Along with the standard deviation, which is just the square root of the variance, it is the measure of dispersion that is most frequently employed.

Dataset 1:

Range: 22-1 = 21

Variance: (sum of squares of deviations from mean) / (number of items - 1) = (902/6) = 150.33

Standard deviation: square root of variance = sqrt(150.33) = 12.37

Dataset 2:

Range: 125.8-120.2 = 5.6

Variance: (sum of squares of deviations from mean) / (number of items - 1) = (7.2) = 1.44

Standard deviation: square root of variance = sqrt(1.44) = 1.2

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Answer: The quotient when 18f^2+45f is divided by 9f is 2f+5.

To find the quotient when 18f^2+45f is divided by 9f, we use the rule for long division of polynomials. We divide the first term of the dividend (18f^2) by the first term of the divisor (9f). This gives us a quotient of 2f.

We then multiply the divisor (9f) by the quotient (2f) and subtract it from the dividend (18f^2+45f). This leaves us with 45f.

Next, we bring down the next term of the dividend (45f) to get 45f + 45f.

Now we divide the new dividend (45f + 45f) by the divisor (9f) to get a quotient of 5.

So the final quotient is 2f + 5.

Step-by-step explanation:

Answer:

9x²-16y^4

Step-by-step explanation:

(3x - 4y²) (3x + 4y²)

→ expand the expression

(3x²) - (4y²)

→ simplify the expression

3² × x² - 4² × (y²)²

→ calculate

9x² - 16(y²)²

→ simplify (use (a^m)^n = a^mn

9x² - 16x^4

Answer: 9x² - 16x^4

hope this helps!

Men are more likely to have diabetes, heart disease, and stroke, whereas women are more likely to have arthritis and depression, with significant regional variation.

In contrast to a woman, who has a smaller body and bone structure, weaker muscles, and thinner skin and a thinner skull, a man has a larger body, greater bone structure, stronger muscles, and thicker skin and skull. 3. Men and women experienced chronic disease at different rates (2.09 vs 1.90 per 100 person-years, respectively).

The most frequent disease was diabetes (40.9%), which was then followed by COPD (32.8%), stroke (9.6%), CHF (8.2%), MI (5.9%), and lung cancer (2.6%).

Males have one X and one Y chromosome, while females typically have two X chromosomes in their pair. The series of developmental events that give bodies and brains male features are brought on by a gene on the Y chromosome.

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The complete question is"The Most Recent Round Of Data Collection Occurred Over The Course Of September 2013–November, 2013 In HINTS 4 Cycle 3.In This Lab, You Will Be Using A Subset Of The HINTS 4 Cycle 3 Data To Practice Creating Effective And Informative Graphical Representations Of Data, Which May Include Histograms And Circle Graphs. About The Data For This Lab, You Need To

The most recent round of data collection occurred over the course of September 2013–November, 2013 in HINTS 4 Cycle 3.In this lab, you will be using a subset of the HINTS 4 Cycle 3 data to practice creating effective and informative graphical representations of data, which may include histograms and circle graphs. "

x = 2y and x*$10 + y*8 = $84 are the required system of equations and when we solve it, we can observe that he spent 6 hours cleaning vehicles and 3 hours gardening.

A group of equations comprising one or more variables is known as a system of equations.

The variable mappings that satisfy each component equation, or the points where all of these equations cross, are the solutions of systems of equations.

We must first define the variables:

x is the amount of time spent cleaning autos.

x = the number of landscaping hours.

Since we know Alexander spent twice as much time cleaning vehicles as he did landscaping, we can say:

x = 2y

Additionally, we know that he made $84 in total, so:

x*$10 + y*8 = $84

The set of equations is thus:

x = 2y

x*$10 + y*8 = $84

We simply swap the first equation with the second one to answer it:

(2y)*$10 + y*8 = $84

y*$28 = $84

y = $84/$28 = 3

He thus spent three hours landscaping, and:
x = 2*y = 2*3 = 6

6 hours washing cars.

Therefore, x = 2y and x*$10 + y*8 = $84 are the required system of equations and when we solve it, we can observe that he spent 6 hours cleaning vehicles and 3 hours gardening.

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