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zhuklara [117]
3 years ago
10

Help asap thx u and plz if u do help say the number for the ancer 1-5

Mathematics
2 answers:
Grace [21]3 years ago
7 0
The answers to these questions are 1 is b, 2 is c, and 3 is a
lesya692 [45]3 years ago
4 0
1b,
2b,
3a, which grade is this?
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I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS
vovikov84 [41]

Answer:

it's C.

Step-by-step explanation:

Hope that helped :D

6 0
3 years ago
36 out of 100 randomly selected taxpayers knew about tax incentives for installing energy-saving furnaces. Find a 90% confidence
tresset_1 [31]

Answer:

The 90% confidence interval for the population proportion who knew about the incentives is (0.28, 0.44).

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}.

For this problem, we have that:

n = 100, \pi = \frac{36}{60} = 0.6

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.36 - 1.645\sqrt{\frac{0.36*0.64}{100}} = 0.28

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.36 + 1.645\sqrt{\frac{0.36*0.64}{100}} = 0.44

The 90% confidence interval for the population proportion who knew about the incentives is (0.28, 0.44).

7 0
3 years ago
Rihanna planned a rectangular courtyard for a park and made a scale drawing using inches as the unit of measurement. She origina
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Answer: One inch represented 3 feet in the first scale, but now 1 inch now represents 4 feet in the second scale.

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