3 years ago

-4/7(-3/5)(-7/3) whats the answere

Mathematics

2 answers:

Salsk061 [2.6K]3 years ago

8 0

The answer is -0.8 welcome

Akimi4 [234]3 years ago

7 0

Exact Form: −4/5

Decimal Form:−0.8

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Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

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This means that $\sigma = 70$

How many trees does she need to sample to obtain an average accurate to within 10 peaches per tree?

She needs to sample n trees.

n is found when M = 10. So

$M = z\frac{\sigma}{\sqrt{n}}$

$10 = 1.96\frac{70}{\sqrt{n}}$

$10\sqrt{n} = 1.96*70$

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