Question

In a science lab, a number of rock samples are weighed. If the scientist finds one of the rocks to weigh 6 pounds and this is 38.7% of the total weight of all of the rocks, what is the weight of all of the rocks? If necessary, round your answer to the nearest tenth.

10.5 lb

2.3 lb

232.2 lb

15.5 lb

Answer 1

15.5

Explanation:

We are trying to find out:

38.7% of what number is 6?

38.7% as a decimal is .387

.387x = 6 Divide both sides by .387

x = 15.503875969

Round 15.5