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jeka57 [31]
3 years ago
10

Jim deposited $350 into a savings account with simple interest at Hunting Bank. He left the money in his account with no changes

for 4 years. At the end of 4 years, his bank statement showed he had earned $32.50 in interest. What is Jim’s interest rate for his savings account? Round to the nearest tenth of a percent. S
Mathematics
1 answer:
padilas [110]3 years ago
4 0

Answer:

2.321428571%

Step-by-step explanation:

Given in the question,

P=$350

T=4years

I=$32.50

We know that

I=PTR/100

32.50=350*4*R/100

R=32.50*100/350*4

R=2.321428571%

So, the rate of interest is 2.321428571%

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Out of 100 people sampled, 42 had kids. Based on this, construct a 99% confidence interval for the true population proportion of
maksim [4K]

Answer:

The 99% confidence interval for the true population proportion of people with kids is (0.293, 0.547).

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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Out of 100 people sampled, 42 had kids.

This means that n = 100, \pi = \frac{42}{100} = 0.42

99% confidence level

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