15 x 25 = 375
15 x 50 = 750
375 + 750 = 1,125
She has 1,125 books.
Its the first one: Letter A
<em>Answer</em>
Part 1: Three and four tenths.
Part 2: 3.0 + 0.4
<em>Explanation. </em>
When writing numbers in words we must use the concept of place values. In this case for instance, the place value of 3 is ones and the place value of 4 is tenths hence called the "<em>four tenths</em>".
3.4 can be written as the sum of 3 and 0.4. So 3.4 in its expanded form is (3+0.4).
Using the confidence interval, it is found that the correct conclusion regarding the hypotheses test is given by:
Reject H0. There is convincing evidence that this individual’s true mean heart rate while working out differs from 150.
<h3>What are the hypotheses tested?</h3>
At the null hypotheses, it is tested if the mean is of 150, that is:

At the alternative hypotheses, it is tested if the mean is different of 150, hence:
.
The confidence interval is (158, 167). Since it does not contain 150, we reject the null hypotheses, hence the correct option is:
Reject H0. There is convincing evidence that this individual’s true mean heart rate while working out differs from 150.
More can be learned about confidence intervals at brainly.com/question/25890103
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Answer:
√y/y c.
Step-by-step explanation:
2y/√4y^3
= 2y / 2 y^3/2
= 1 / √y
= √y/y