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11 months ago

Help my hw is due by 12:00 am for final grade!!

Mathematics

1 answer:

Dovator [93]11 months ago

6 0

Length has 5 cubes

width has 3 cubes

height has 7 cubes

Volume = length x width x height

5/2 * 3/2 * 7/2 = 105/8 = 13.125 ft^2

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Simplify the following expression using only positive exponents. Help please!? It has to be only positive exponents the -9/7t an

wlad13 [49]

(-9t^25) / (7t^26) = -9 / (7t)

8 0

3 years ago

Use the key features of the polynomial f(x) = 6x4 + 4x3 − 5x2 − 2x + 1 to describe its end behavior.

Maksim231197 [3]

Answer:

It is answer D

Because the left side continues to negative infinity and the right side continues to positive infinity.

6 0

3 years ago

Suppose that you borrow $3000.00 from a friend and promise to pay back $4935.00 in 3 years. What simple interest rate will you p

Amiraneli [1.4K]

Answer:

the simple interest rate is 18.00%

Step-by-step explanation:

The computation of the simple interest rate is shown below:

Amount = Principal × (1 + rate)^years

$4,935 = $3,000 × (1 + rate)^3

After solving it, the rate of percentage is 18.00%

Hence, the simple interest rate is 18.00%

7 0

3 years ago

What is the factored form of 5x+x^2=0

Colt1911 [192]

$5x+x^2=0\\ \\x(5+x)=0\\ \\x=0 \ \vee \ 5+x=0 \\\\ x=0 \ \vee \ x=-5$

3 0

3 years ago

A researcher would like to estimate the proportion of all children that have been diagnosed with Autism Spectrum Disorder (ASD)

aliina [53]

Answer:

The researcher should use a sample size of at least 140 children to get a margin of error to be within 2%.

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

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$ is the margin of error.

95% confidence interval

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $z = 1.96$ .

We have that:

$M = 0.02, \pi = 0.0147$

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

$0.02 = 1.96\sqrt{\frac{0.0147*(1-0.0147)}{n}}$

$0.02\sqrt{n} = 0.2359$

$\sqrt{n} = 11.79$

$n = 139.1$

The researcher should use a sample size of at least 140 children to get a margin of error to be within 2%.

4 0

3 years ago

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