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Mathematics

1 answer:

shusha [124]3 years ago

4 0

For question 1, just plug in -2 as h.

 $-2(-2)^2-(-2)+2$

You would get...

$h(-2)=-4$

Hope this helped! -4, or option 1, is correct!

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Which is eWhich is equivalent to 3 square root of 125quivalent to ?

Mkey [24]

Answer:

15 $\sqrt{5}$

Step-by-step explanation:

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2 years ago

In the past, 21% of all homes with a stay-at-home parent, the father is the stay-at-home parent. An independent research firm ha

Afina-wow [57]

Answer:

A sample size of 79 is needed.

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.

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

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95% confidence level

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A sample size of n is needed.

n is found when M = 0.09. So

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$0.09 = 1.96\sqrt{\frac{0.21*0.79}{n}}$