Question

Lisa and Sarah decided to meet at a park bench near both of their homes. Lisa lives 1850 feet due west of the park bench and Sarah lives 1430 feet due east of the park bench. They decided to leave their homes at 7:00 PM, with Sarah and Lisa traveling at individual constant speeds that will ensure they arrive at the bench at the same time. The function f given by f(t) = 3280 - 640t gives the distance between them in terms of t, the number of minutes that have passed since 7:00 PM. What is the domain of this function in the context of the problem? (use interval notation for the answer)..

Answer 1