Can someone help with this math problem pleaseeee

Mathematics

1 answer:

erastovalidia [21]2 years ago

3 0

<h3>Answer: Choice A</h3>

Explanation:

The square root undoes the squaring operation.

Think of a square that is 1 ft by 1 ft. Its area would be 1*1 = 1 sq ft.

Now imagine you told your friend "the area is 1 sq ft" and you didn't relay the side lengths. Your friend would use the square root to find the side length is 1 ft.

I'm not sure why your teacher is using plus minus notation when that is not correct. Saying $\sqrt{1} = \pm 1$ is not true. The result of a square root is simply one value only. If your teacher meant $\pm \sqrt{1} = \pm 1$ , then it would be a true statement; however, there's no need to involve negative numbers for this problem.

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The probability that it'll rain tomorrow in Ohio is 30%

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It raining in Alaska and raining in Ohio are independent events. One does not control the other or affect the other in any way.

For two independent events (let's call them A and B), the Probability of A and B both occurring is given by P(A and B) = P(B) x P(B).

For this problem, let A = rain in Ohio and B= rain in Alaska.

P(A and B) = P(A) x P(B)
$\frac{12}{100} =(P(A))( \frac{3}{10} )
$
$( \frac{12}{100}) ( \frac{100}{30} )=P(A)$
$P(A)= \frac{12}{30}= \frac{2}{5}$