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lbvjy [14]
2 years ago
5

IWHDHDNDJBFJDNX HELP!!!!!​

Mathematics
1 answer:
Sati [7]2 years ago
8 0

Answer:

The answer should be B.

Step-by-step explanation:

I got the answer before. Can't remember if I was right. Also A can also be correct.

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1. Vincent spent 4/7 of his money on a pair of shoes. The shoes cost $48. How much money did he have at first?
ra1l [238]
4/7 of his money = $48

1/7 of his money = $48 ÷ 4 = $12

7/7 of his money = $12 x 7 = $84

Answer: $84
3 0
3 years ago
What are decimals please help me ​
vampirchik [111]

Answer:

A decimal is a number that can't be divided easily

Step-by-step explanation:

5 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
A marketing consultant observed 40 consecutive shoppers to estimate the average money spent by shoppers in a supermarket store.
KonstantinChe [14]

Answer:

0.998 is the probability that the average money spent by  a sample of 40 shoppers is within $10 of the actual population mean.

Step-by-step explanation:

We are given the following information in the question:

Standard Deviation, σ = $21.51

We are given that the distribution of average money spend is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

We have to find:

P( average money spent is within $10 of the actual population mean.)

= P( z \leq \displaystyle\frac{10\times \sqrt{40}}{21.51}}) = P(z \leq 2.94)

Calculation the value from standard normal z table, we have,  

P(z \leq 2.94) = 0.998

6 0
3 years ago
According to the graph, which of the following is true? Half of each day is taken up by sleeping and eating. School and homework
aivan3 [116]

Answer:

Half of each day is taken up by sleeping and eating.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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