**Answer:**

D

**Step-by-step explanation:**

4.10pm-1.55pm

=3.70pm-1.55pm

=2hr15min

**Answer:**

Then the count of 1 cent stamps is 15 −x. So for total cost we have. [45x + 1(15 − x)]cents = $4.55. but there are 100 cents in 1 dollar so we change the above to. [45x +1(15 −x)] 100 = 4.55. Multiply both sides by 100. 45x + 15− x = 455. 44x = 440.

**Step-by-step explanation:**

It’s a quadratic function