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3 years ago

2/4 lb= ? plz anwser

Mathematics

2 answers:

Minchanka [31]3 years ago

4 0

Answer:

2 lb

Step-by-step explanation:

2 divided by 4 is 2

Svetlanka [38]3 years ago

3 0

Answer:

1/2 lb (or 0.5 lb)

Step-by-step explanation:

I'm not sure if you want me to convert it into another unit, but here you go!

2/4 simplified is 1/2

2 divided by 4 is 0.5

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Square A is a scaled version of square B. The dimensions of square A are three times the dimensions of square B. The area of squ

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Answer:

The side of square A is 30 cm.

Step-by-step explanation:

Given that,

The dimensions of square A are three times the dimensions of square B.

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3 years ago

g A researcher wants to construct a 95% confidence interval for the proportion of children aged 8-10 living in Atlanta who own a

Helga [31]

Answer:

The sample size needed is 2401.

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.

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Estimate the sample size needed if no estimate of p is available so that the confidence interval will have a margin of error of 0.02.

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There is no estimate of p available, so we use $\pi = 0.5$

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

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$0.02\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.02}$

$(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.02})^{2}$

$n = 2401$

The sample size needed is 2401.

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Answer:

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