3 years ago

If k/-8 = -7 then what is k?

Mathematics

1 answer:

Marat540 [252]3 years ago

7 0

Answer:

Step-by-step explanation:

Multiply -8 on both sides and k = 56

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Answer: 196

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As per given , we have

Population standard deviation: $\sigma=0.6\ lb$

Significance level : $\alpha: 1-0.98=0.02$

Using the z-value table , the critical z value for 98% confidence : $z_{\alpha/2}=2.33$

Margin of error : E= 01 lb

Sample size : $n=(\dfrac{z_{\alpha/2}\cdot\sigma}{E})^2$

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Simplify , we get

$n=195.4404\approx196$

Hence, the minimum sample size required for books = 196

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