Question

Marco starts reading a 350-page book at 9 a.m. The number of pages P Marco has left to read t hours after 9 a.m. is modeled by the function P(t) = 350 - 45t. During which of the following time periods does Marco read the same number of pages he reads between 11 a.m. and 1 p.m.? Select all that apply
A. 9 a.m. to 11 a.m.
B. 11 a.m. to 12 noon
C. 12:30 p.m. to 1:30 p.m.
D. 2 p.m. to 4 p.m.
E. 1:30 p.m. to 3:30 p.m.

Answer 1

Answer:

A, D, and E

Step-by-step explanation:

So the function 350-45t for t hours means that he reads 45 pages every hour. So, going from 11 AM to 1 PM is two hours. Since his reading pace doesn't change, we just have to look for an answer that has a difference of two answers. The only answers that have a difference of two hours are A, D, and E.