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2 years ago

What is the product of 9200 and 2.3 x 10^3 expressed in scientific notation

Mathematics

1 answer:

Damm [24]2 years ago

8 0

Answer:

21.16 x 10^6 or 2.116 x 10^7

Step-by-step explanation:

First, rewrite 9200 in scientific notation. This can be expressed as 9.2 x 10^3.

Now you can multiply and add the exponents.

9.2 x 2.3 = 21.16

3 + 3 = 6

21.16 x 10^6 or 2.116 x 10^7

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Find the mean of the data in the bar chart below.

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<h2>Answer:</h2>

<h2>Step-by-step explanation:</h2>

<u><em>The mean is also the average.</em></u>

Add up all the number of students all together:

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3 years ago

The length of the hypotenuse of the right triangle is 25 cm, the length of one of the legs is 10 cm. What is the length of the s

Anna007 [38]

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Step-by-step explanation:

Call the triangle ABC, with the right angle at B, the hypotenuse AC=25, and the given leg AB=10. The altitude to the hypotenuse can be BD. Since the "other leg" is BC, we believe the question is asking for the length of DC.

The right triangles formed by the altitude are all similar to the original. That means ...

AD/AB = AB/AC . . . . . . ratio of short side to hypotenuse is a constant

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3 years ago

Assume that adults were randomly selected for a poll. They were asked if they "favor or oppose using federal tax dollars to fund

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At the null hypothesis, it is tested if the <u>proportion is of 0.5</u>, that is:

$H_0: p = 0.5$

At the alternative hypothesis, it is tested if the <u>proportion is different of 0.5</u>, that is:

$H_1: p \neq 0.5$

The test statistic is given by:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1 - p)}{n}}}$

In which:

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p is the value tested at the null hypothesis.
n is the sample size.

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$p = 0.5, n = 483 + 398 = 881, \overline{p} = \frac{483}{881} = 0.5482$

The value of the test statistic is:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1 - p)}{n}}}$

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Looking at the z-table, z = -2.86 has a p-value of 0.0021.

2(0.0021) = 0.0042

Since the <u>p-value of the test is 0.0042 < 0.01</u>, it can be concluded that the proportion of subjects who respond in favor is different of 0.5.

A similar problem is given at brainly.com/question/24330815

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