What is >>>>> -x<15-2x

PLEASE PLEASE PLEASE HELP ME FIND THE BASE AREA

elena-s [515]

Answer:

$v olume= \frac{1}{3} \times \: height \times surface \\ 1594.5 = \frac{1}{3} \times {x}^{2} \times 15.8 \\ {x}^{2} = (1594.5 \times 3) \div 15.8 = 302.753 \\ x = 17.399$

8 0

3 years ago

Loan for Vehicle Loan APR Payment #1 $20,000 for 66 months 2.17% $322 #2 $25,000 for 78 months 3.38% $357 #3 $30,000 for 84 mont

Vilka [71]

The second loan would cost

6 0

4 years ago

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

irakobra [83]

Answer:

We need a sample size of at least 383.

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 $1 - \frac{\alpha}{2}$ .

The margin of error is:

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

85% confidence level

So $\alpha = 0.15$ , z is the value of Z that has a pvalue of $1 - \frac{0.15}{2} = 0.925$ , so $Z = 1.44$ .

How large a sample would be required in order to estimate the fraction of tenth graders reading at or below the eighth grade level at the 85% confidence level with an error of at most 0.03

We need a sample size of at least n.

n is found with $M = 0.03, \pi = 0.21$