Mickey needs $80 to buy a fish tank for Nemo. So far he has been able to save $8. He is going to be cleaning up this weekend at the park where he makes $9 per hour. Which inequality shows the minimum number of hours h , that Mickey can work at the park to earn enough to buy the fish tank for Nemo?
a. 8 + 9n ≤ 80, so n ≤ 8
b. 8 + 9n ≥ 80, so n ≥ 8
c. 9n ≥ 80 + 8, so n ≥ 9.8
d. 9n ≤ 80 + 8, so n ≤ 9.8