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3 years ago

The number 323,000,000 in scientific notation is 3.23 x 10". What is the value of n?

Mathematics

1 answer:

Len [333]3 years ago

5 0

<em>Answer: your answer is 32.3 i hope this helps</em>

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Shea wrote the expression 5(y+2)+4 to show the amount of money five friends paid for snacks at a baseball game.Which espression

zhenek [66]

Answer: Algebraic linear expression

Step-by-step explanation:

An algebraic expression in mathematics is an expression built up from integer constants with

unknown variables, and the algebraic operations. For example, 6x² − 2xy + 20 is an algebraic expression which is quadratic in nature.

The general formular for algebraic linear expression is Y - MX - C

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3 years ago

??????? Which exspression represents the total cost of the red shirts?

Vlad1618 [11]

Answer:

Step-by-step explanation:

One shirt cost (75/5).

3 read shirts cost (75/5)*3=75*(3/5).

8 0

3 years ago

Read 2 more answers

I need help with this

Stells [14]

Answer:

AB = 21

Step-by-step explanation:

So we have two triangles (AEB and ADC), and they're similar by AA

Now, you can find the ratio of similitude by checking AE/AD which is 14/26 = 7/13

AB/AC = 7/13

Take AB as x aight

x/x+18 = 7/13

x=21

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2 years ago

Factor using x method and foil to prove

Olegator [25]

Answer:
Step by step:

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2 years ago

The dwarves of the Grey Mountains wish to conduct a survey of their pick-axes in order to construct a 99% confidence interval ab

Dmitry_Shevchenko [17]

Answer:

The minimum sample size needed is 125.

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:

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

For this problem, we have that:

$\pi = 0.25$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

What minimum sample size would be necessary in order ensure a margin of error of 10 percentage points (or less) if they use the prior estimate that 25 percent of the pick-axes are in need of repair?

This minimum sample size is n.

n is found when $M = 0.1$