Answer: 
Step-by-step explanation:
q(x) is increasing for
.
p(x) is increasing for
.
So, both functions are increasing for
.
A liter is 0.264 gallons so 13 * 0.264 = 3.432 and round it up it is 3.4
The answer is -40 because if you get rid of the negative sign and add instead of subtract... you get 40 so its like adding in the opposite direction.