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mash [69]
2 years ago
12

An account earns a simple interest.

Mathematics
1 answer:
shtirl [24]2 years ago
6 0
Interest is $336

Account balance is $1036 at the end of 6 years
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Solve for x in a triangle. Round your answer to the nearest hundredth
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The y has to be negative but the x positive. So that leaves only (3,-4)

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3 years ago
At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.03 for the estimation of a population pro
Gnom [1K]

Answer:

A sample of 1068 is needed.

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}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

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.

At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.03 for the estimation of a population proportion?

We need a sample of n.

n is found when M = 0.03.

We have no prior estimate of \pi, so we use the worst case scenario, which is \pi = 0.5

Then

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.03 = 1.96\sqrt{\frac{0.5*0.5}{n}}

0.03\sqrt{n} = 1.96*0.5

\sqrt{n} = \frac{1.96*0.5}{0.03}

(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.03})^{2}

n = 1067.11

Rounding up

A sample of 1068 is needed.

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2 years ago
A line has a y-intercept at (0,4) and an x-intercept at (6,0). What is the slope of the line?
Iteru [2.4K]
3/2 is the answer
i say this because you have to think of the problem as

4y=6x

divide the 4

y=6x/4

simplify
3/2
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3 years ago
Read 2 more answers
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