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3 years ago

) What is the area of triangle QBA? Enter only the number to represent the area below. plz i need the answer

Mathematics

1 answer:

olasank [31]3 years ago

8 0

Answer:

Step-by-step explanation:

Even though the triangle is "upside down"

a = (1/2)bh

b is QB = 4

h is QA = 7

a = (1/2) * 4 * 7

a = 14

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Vika [28.1K]

Answer:

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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.

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For this problem, we have that:

$n = 180, \pi = \frac{14}{180} = 0.0778$

95% confidence level

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

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.0778 - 1.96\sqrt{\frac{0.0778*0.9222}{180}} = 0.0387$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.0778 + 1.96\sqrt{\frac{0.0778*0.9222}{180}} = 0.1169$

The 95% confidence interval for the overall noncompliance proportion is (0.0387, 0.1169).

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3 years ago

How to solve a rental car costs 34.95 for the first 150 miles and .35 for each additional mile. How much will the rental car cos

Pani-rosa [81]

You can set up an equation, where 'x' is equal to the number of additional miles after 150 miles.

$\sf 0.35x+34.95$

To figure out how much the rental car will cost after 275 miles, first find out how many additional miles there are after 150 miles. 275 - 150 = 125. Now plug this in for 'x' in our equation:

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