Question

The amount of money earned, in dollars, varies directly as the number of hours worked. After 9 hours, 270 dollars were earned.

How long, in hours, does it take to earn 390 dollars? Do not include units in your answer.

Answer 1

9 divided by 270 = 30


30 x 13 = 390

Answer 2

Answer: 13 Hours

Explanation:

1. 270/9 = 30 dollars per hour

2. 390/30 = 13 hours