**Answer:**

D

**Step-by-step explanation:**

It's a guess because none of them look like the exponential form. However, I think D is probably the answer you want.

On this site it should be written as C = 15^3.

**Answer:**

400%

**Step-by-step explanation:**

**Tim spends 500 minutes at the school.**

**Step-by-step explanation:**

Given,

Time for lunch = 45 minutes

Time for study hall = 45 minutes

Total = 45+45 = 90 minutes

This represents 18% of the total minutes Tim spend at school.

Let,

x be the total minutes Tim spend at school.

18% of x = 90 minutes

Dividing both sides by 0.18

**Tim spends 500 minutes at the school.**

**Keywords:** percentage, division

**Learn more about division at:**

#LearnwithBrainly