Question

A mine extracts 2 tons of ore in an hour. Of the total ore extracted in a day, 4 tons is purchased by the government and more than 10 tons is sold to a mineral extractor. If the mine operates for x hours in a day, what is the simplest inequality that represents the number of hours the mine must operate to meet its obligations?

A.
x > 3
B.
x > 4
C.
x > 5
D.
x > 7

Answer 1

Answer should be b not abor c

Answer 2

Explanation:

So you know that you are producing two tons of ore an hour. Since the government is buying four tons a day and a mineral extractor is buying more than ten tons a day you would need over 14 tons over ore a day. Since you are extracting 2 tons in one hour it will take at least seven hours to get a bare minimum. But since the mineral extractor is buying upwards of ten tons you would have to work longer so your answer would be D. X>7