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Olenka [21]
3 years ago
13

The answer to this problem when u multiply it 7/8 × 72

Mathematics
2 answers:
devlian [24]3 years ago
5 0
7/8 x 72/1= 7/1 x 9/1 = 63
uysha [10]3 years ago
4 0
7/8* 72
= 7/8* (8*9)
= 7*9 (because 8 and 8 cancel out)
= 63

The final answer is 63~
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Jaime placed $2800 in a savings account which earns 4.3% interest compounded annually. How much will she have in the account aft
Rasek [7]

Answer: $4840

Step-by-step explanation:

A = p(1+r/n)^nt

A = 2800(1+0.043)^13

A = 4840

7 0
2 years ago
Suppose that a market research firm is hired to estimate the percent of adults living in a large city who have cell phones. 500
Alborosie

Answer:

The 95% confidence interval estimate for the true proportion of adults residents of this city who have cell phones is (0.81, 0.874).

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 = 500, \pi = \frac{421}{500} = 0.842

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}} = 0.842 - 1.96\sqrt{\frac{0.842*0.158}{500}} = 0.81

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.842 + 1.96\sqrt{\frac{0.842*0.158}{500}} = 0.874

The 95% confidence interval estimate for the true proportion of adults residents of this city who have cell phones is (0.81, 0.874).

6 0
3 years ago
Please help!!!<br> will pick brainliest
olga55 [171]

Answer:

circumference is 81.68

area is 530.93

Step-by-step explanation:

C=2πr=2·π·13≈81.68141

A=πr2=π·132≈530.92916

8 0
2 years ago
Need help to find the unit rate
Elodia [21]
2 miles: 1/2 hour
? mile: 1 hour
(2÷1/2)mi/h or B is your final answer. Hope it help!
5 0
3 years ago
Which of the following functions is graphed below?
dalvyx [7]
Hmmm I think either D or C
6 0
3 years ago
Read 2 more answers
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