need help on proportions question urgently!!!!!!

Answer: 77

Took the test :)

A skewed distribution is neither symmetrical nor normal as the data values trail off more sharply on one side than on the other. It occurs due to the lower or upper bounds on data. In symmetric distribution left and right sides mirror each other.

a. The given data distribution is skewed as the data is not even on either side.

b. The median is defined as the middle value of a data set. Here 20 is the median as it is the mid point.

c. The average of the given numbers is known as mean and it is obtained by dividing sum of numbers divided by total numbers.

Mean = 207 / 11 = 18.81

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Answer:

a) 0.091

b) 21.6%

Step-by-step explanation:

a) divide by 100

b) multiply by 100

Answer:

Step-by-step explanation:

80-31.16=48.84 (the amount of the money that Elsa spent)

48.84:8.14=6 (the amount of coffee that she bought)

Answer:

• (a)80 mg

• (c)f(t)=80(0.5)^t

• (d)0.625 mg

Explanation:

Part A

From the point (0, 80), we see that the person took 80 mg of the medicine at the start.

Part B

From the graph:

From points (0,80) and (2,20); and (2,20) and (4,5)

• After 2 hours, the amount of medicine has been reduced by a factor of 1/4.

Therefore, after 1 hour, the amount of medicine is reduced by a factor of 1/2.

The completed table is attached below:

Part C

An exponential function is written in the form:

Since the amount of medicine is halved every 1 hour:

The rate of decrease = 1/2

The starting amount, Ao = 80 mg

Therefore, an equation that defines f is:

Part D

After 7 hours, when t=7

After 7 hours, 0.625 mg of medicine remains in the person's body.

Answer:

0.216

Step-by-step explanation:

If the probability of green, P(green) is 40%, the probability of red, P(red) is 60%.

The probability of a light being red is not affected by the colour of the previous light, so at each of the 3 lights, the probability of red is always 60%.

To find the probability that all three lights will be red, multiply the three probabilities together. (Convert them to decimals first).

0.6 x 0.6 x 0.6 = 0.216

The best estimate of the product is b) 1 times 10.

The expression (7/8)8(1/10) can be simplified by canceling out the factor of 8 in the numerator and denominator. This yields the expression 7/10. Therefore, the best estimate of this expression would be 1 times 10, since 7/10 is closest to 1 when rounded to the nearest whole number, and 10 is the closest whole number to the denominator of 7/10.

Thus, the answer is option b, 1 times 10. It is important to note that when estimating products or other mathematical expressions, it is important to consider the context and choose an estimate that is reasonable and makes sense in the given situation.

Correct Question :

Which expression is the best estimate of the product of (7/8)8(1/10)?

a) 0 times 8

b) 1 times 10

c) 7 times 8

d) 1 times 8

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Answer:

No

Step-by-step explanation:

No

Answer:

31

Step-by-step explanation:

\(4^{2}\)=16

16+15=31

Answer:

D

Step-by-step explanation:

i gotchu what do u want

Answer:is it 3?

Step-by-step explanation:

sorry if im wrong im not sure

Answer:

I DONT KNOW IM VERY SORRY PLEASE GIVE ME 5 STARS I WOULD REALLY APPRECIATE IT...

Step-by-step explanation:

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Answer:

its 3

Step-by-step explanation:

The system of equations to represent the total cost, y, when x additional pieces are purchased with a basic cat tree at each store are;

y = 50x + 100    ------(eq 1)

y = 75x + 50    ------(eq 2)

A) Let the total cost of the cat tree be y

Let each additional piece added be x.

Since basic tree is $100 and each additional platform costs $50, then we can say that;

y = 50x + 100    ------(eq 1)

Now, their basic cat tree starts at $50 and each additional piece costs $75. Thus;

y = 75x + 50    ------(eq 2)

B) Subtract eq 1 from eq 2 to gte;

25x - 50 = 0

25x = 50

x = 50/25

x = 2

y = 75(2) - 50

y = $100

C) The Store that would be cheaper depending on the add - ons is Puuur Place because as x increases, it's y-value increases at a lesser rate than that of Meow.

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Answer:

The rabbit population will reach its peak after 10 years.

Step-by-step explanation:

Suppose we have a quadratic function in the following format:

\(p(t) = at^{2} + bt + c\)

The vertex of the function is the point:

\((t_{v}, p(t_{v})\)

In which

\(t_{v} = -\frac{b}{2a}\)

If a is negative, the vertex is a peak.

In this question:

\(p(t) = -4t^{2} + 80t + 1200\)

So

\(a = -4, b = 80, c = 1200\)

According to this quadratic function, after how many years will the rabbit population reach its peak

This is \(t_{v}\)

\(t_{v} = -\frac{b}{2a} = -\frac{80}{2*(-4)} = 10\)

The rabbit population will reach its peak after 10 years.

I hope this can help you out some

Answer:

13 units

Step-by-step explanation:

Confidence coefficient or confidence level for the interval is 0.95.

What is confidence coefficient?

The proportion of samples of a given size that may be anticipated to contain the true mean is all that the confidence coefficient is.

Confidence level:

Confidence level means the proportion or frequency of acceptable confidence intervals that contain the true value of the unknown parameter.

For example,

A 0% confidence level means you have no faith at all that if you repeated the survey that you would get the same results.

Main Body :

Confidence Interval = 95%

Hence the confidence interval would be 0.95.

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The linear function for this problem is defined as follows:

y = -x + 14.

The slope-intercept equation for a linear function is presented as follows:

y = mx + b

The parameters of the definition of the linear function are given as follows:

The slope of segment JL is given as follows:

(6 - 4)/(4 - 2) = 1.

When two lines are perpendicular, the multiplication of their slopes is of -1, hence:

y = -x + b.

When x = 6, y = 8, hence the intercept b is given as follows:

8 = -6 + b

b = 14.

Hence the equation is:

y = -x + 14.

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The length of the side chosen in order to make the cardboard box is 7cm in the square.

What is square?

Having four equal sides, a square is a quadrilateral. There are numerous square-shaped objects in our immediate environment. Each square form may be recognised by its equal sides and 90° inner angles. A square is a closed form with four equal sides and interior angles that are both 90 degrees. Numerous different qualities can be found in a square.

We are given that rajiv wishes to make a cube without lid with cardboard.

5a² = 245 sq.cm

a² = 245/5 = 49

a = 7 cm

Hence the length of the side chosen in order to make the cardboard box is 7 cm.

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Answer:

-5/3

Step-by-step explanation:

5 ➗ -3

=> 5/-3

=> -5/3 or -1.66667

5 divided by -3=1.666666666666667

The component form of the velocity breaks down the plane's speed into its horizontal and vertical components, which are (200√3, 200) respectively. This allows for a detailed understanding of the plane's motion in different directions.

The component form of the velocity of the plane can be found by breaking down the velocity into its horizontal and vertical components. In this case, the plane is flying on a bearing of 60 degrees at a speed of 400 mph. To determine the horizontal component, we use the cosine of the angle (60 degrees) multiplied by the magnitude of the velocity (400 mph). This gives us 400 * cos(60) = 200√3 mph. The vertical component is determined by using the sine of the angle (60 degrees) multiplied by the magnitude of the velocity (400 mph). This gives us 400 * sin(60) = 200 mph. Therefore, the component form of the velocity of the plane is (200√3, 200).

The component form provides a way to represent the velocity vector of the plane in terms of its horizontal and vertical components. The first component (200√3) represents the horizontal component, indicating how fast the plane is moving in the east-west direction. The second component (200) represents the vertical component, indicating how fast the plane is moving in the north-south direction. By breaking down the velocity vector into its components, we can analyze and understand the motion of the plane in a more detailed manner.

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We can estimate with 99% confidence that the speed of all cars falls within the range of approximately 70.08 to 73.92 miles per hour.

A. To compute the standard error of the mean, we can use the formula:

Standard Error of the Mean = Standard Deviation / √(Sample Size)

Given:

Sample Size (n) = 200

Standard Deviation (σ) = 5 miles per hour

Standard Error of the Mean = 5 / √(200)

Standard Error of the Mean ≈ 0.3536 miles per hour

B. To determine a 99% confidence interval estimate for the speed of all cars, we can use the following formula:

Confidence Interval = Sample Mean ± (Critical Value) * (Standard Error of the Mean)

The critical value depends on the desired confidence level and the sample size. For a 99% confidence level with a sample size of 200, the critical value can be found using a t-distribution table or a statistical software. Let's assume the critical value is 2.617 (hypothetical value for demonstration purposes).

Sample Mean (x) = 72 miles per hour

Confidence Interval = 72 ± (2.617 * 0.3536)

Confidence Interval ≈ (70.08, 73.92) miles per hour

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Answer:

false

true

true

true

true

false

true

false

false

answers r in order of pictures

Step-by-step explanation:

The graph located in the lower right section represents the point with coordinates (r, θ) = (-3, -π/4).

A point in polar form is described by its magnitude and angle in standard position. When magnitude is negative it means that its angle is +π radians than its equivalent with positive magnitude.

Then, we can determine the angle of the resultant point by means of the following expression:

θ⁻ = θ⁺ + π   (1)

Where:

If we know that θ⁺ = -π/4 and r = 3, then the angle of the point in standard position is:

θ⁻ = θ⁺ + π

θ⁻ = -π/4 + π

θ⁻ = 3 · π/4

Hence, the graph located in the lower right section represents the point with coordinates (r, θ) = (-3, -π/4). \(\blacksquare\)

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Answer:

10th number in the sequence is 786432

n = 4

Step-by-step explanation:

Multiply the following number by 4 (starting at #4) until you reach the 10th number in the sequence