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3 years ago

Help on the 2nd question

Mathematics

1 answer:

Marysya12 [62]3 years ago

8 0

Answer:

$1,507.64

Step-by-step explanation:

First, you must find 8.25% then subtract it from the original value, $16,368. To do this, you divide 8.25 by 100, like you did in the first problem. Then, you use the value you get (.0825) and multiply it by $16,368 to find 8.25% of it. you will get $1350.36. Lastly, subtract this number from your original value. By doing this, you are subtracting the sales tax from the cost of the car to find the initial cost.

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Find the errors and identify them

Stella [2.4K]

Answer:

this is confused me so much is it supposed to be a trick or is that a actual question-

5 0

3 years ago

You dive 21 feet from the surface of a lake in 7 seconds. What is the mean change in your position in feet per second?

Alexxandr [17]

Answer:

Unit rate: 21feet / 7seconds = 3 feet per second.

3 feet per second * 5 seconds = 15 feet

21 feet + 15 feet =36 feet

You are 36 feet from the surface.

Step-by-step explanation:

5 0

3 years ago

5 inches is blank times big as 1 inch

alina1380 [7]

Answer:

5 inches is <u>5</u> times as big as 1 inch

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4 years ago

The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the e

kow [346]

Answer:

The 80% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.149, 0.207).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

Suppose a sample of 292 tenth graders is drawn. Of the students sampled, 240 read above the eighth grade level.

So 292 - 240 = 52 read below or at eight grade level, and that $n = 292, \pi = \frac{52}{292} = 0.178$

80% confidence level

So $\alpha = 0.2$ , z is the value of Z that has a pvalue of $1 - \frac{0.2}{2} = 0.9$ , so $Z = 1.28$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.178 - 1.28\sqrt{\frac{0.178*0.822}{292}} = 0.149$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.178 + 1.28\sqrt{\frac{0.178*0.822}{292}} = 0.207$

The 80% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.149, 0.207).

3 0

3 years ago

Simple Quadratic equation given a formula

IRINA_888 [86]

Answer:

12 feet.

Step-by-step explanation:

h= -(2)^2+8(2)

h= -4+16

h= 12

8 0

4 years ago