This is an A. <span>observational study. They are observing the use of cell phones differs between people with or without cancer.
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Answer:
(6/5) mph
Step-by-step explanation:
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<h2>
Explanation:</h2>
For a better understanding of the problem I've built up two triangles from the given triangular shape. So these two triangles are similar. Therefore, we can solve this problem by using ratios and corresponding sides in this way:

But our goal is to find y. Let's call w the height of the small triangle, then:

Applying the concept of ratios again:

<h2>Learn more:</h2>
Right triangle: brainly.com/question/10684799
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Well, the answer would bee 1/10 for a simple reason: the 3 in 7.315 is in the tenth's spot while the 3 in 893.5 is in the ones. a one spot different that can be proven with logic.