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3 years ago

How do you write seven hundred thirty one in standard form

Mathematics

2 answers:

Katarina [22]3 years ago

6 0

This is the standard for of seven hundred (700) thirty (30) one (1) :
Answer: 731

Ne4ueva [31]3 years ago

6 0

Answer:

731

Step-by-step explanation:

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Why do we Sample instead of looking at the entire population if we understand that a Sample is not the true representative of th

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Answer:

e. All of the reasons are correct.

Step-by-step explanation:

In most cases, studying all the population is impossible. In other cases, it is too expensive or time consuming.

A sample will give us, in most cases and combined with tools of statistical analysis (hypothesis testing or confidence intervals), enough information to make an unbiased estimation about the characteristic of the population we are studying.

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3 years ago

A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. He wants to construct the 95

Galina-37 [17]

Answer:

The minimum sample size required for the estimate is 345.

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:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

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

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

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

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The standard deviation is known to be 1.8.

This means that $\sigma = 1.8$

What is the minimum sample size required for the estimate?

This is n for which M = 0.19. So

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

$0.19 = 1.96\frac{1.8}{\sqrt{n}}$

$0.19\sqrt{n} = 1.96*1.8$

$\sqrt{n} = \frac{1.96*1.8}{0.19}$

$(\sqrt{n})^2 = (\frac{1.96*1.8}{0.19})^2$

$n = 344.8$

Rounding up to the next integer:

The minimum sample size required for the estimate is 345.

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3 years ago

Round 1231.50432 to the nearest tenth

Verizon [17]

Answer:

1231.5

Step-by-step explanation:

I hope this help.

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3 years ago

A box of cookies cost $2 before tax. Find the after-tax cost if the sales tax was 8.5%.

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Answer:

$2.17 total

Step-by-step explanation:

2 (0.85) = v2.17

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3 years ago

Hello ! I need a solution for this exercise: either 1≤x≤2 and let A = -3 + 8 / (x + 1) -2x² Show that -9≤A≤-1

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3 years ago