Question

a jet plane has 150,000 pounds of fuel after the first hour of flight. the four engines consume a total of 12,000 pounds per hour at its cruising altitude. how many pounds of fuel remain after the 10th hour? 270,000 pounds 120,000 pounds 42,000 pounds 30,000 pounds

Answer 1

The answer is 42,000 pounds.

Explanation:

Use the arithmetic sequence equation. You must consider that at the top of each hour there is 12000 less pounds of fuel than before that are you are once again subtracting 12000 from. Thus multiplying 12000(10) and subtracting that from 150,000 will not work.