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1 year ago

Find the product of these complex numbers (8+6i)(-5+7i)

Mathematics

1 answer:

spayn [35]1 year ago

3 0

Answer:

Step-by-step explanation:

= -40 + 56i -30i +42i

= 68i - 40

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Describe the sampling distribution of p(hat). Assume the size of the population is 30,000.

Naya [18.7K]

Answer:

a) $\mathbf{\mu_ \hat p = 0.6}$

b) $\mathbf{\sigma_p =0.01732}$

Step-by-step explanation:

Given that:

population mean $\mu$ = 30,000

sample size n = 800

population proportion p = 0.6

The mean of the the sampling distribution is equal to the population proportion.

$\mu_ \hat p = p$

$\mathbf{\mu_ \hat p = 0.6}$

The standard deviation of the sampling distribution can be estimated by using the formula:

$\sigma_p = \sqrt{\dfrac{p(1-p)}{n}}$

$\sigma_p = \sqrt{\dfrac{0.6(1-0.6)}{800}}$

$\sigma_p = \sqrt{\dfrac{0.6(0.4)}{800}}$

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$\sigma_p = \sqrt{3 \times 10^{-4}}$

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2 years ago

Please help!!!!!! Solve for x:

nordsb [41]

A
Explanation: You want to get x by itself. So add +7 to -7 to cancel it out, do the same thing to 4.
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2 years ago

Plz help :( what is 10,000,000(20)^10 !?

Sergio [31]

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Step-by-step explanation:

First do 20^10 = 10,240,000,000,000.

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