Time Until Two Cars Pass
A red car is traveling at a constant speed of 45 mph. A blue car is traveling toward the red car, braking such that its velocity is given by v(t) = 60 - 30t. If the cars are 10 miles apart at t = 0, in how many hours will they pass each other?
A
2 hours
B
0.5 hour
C
0.1 hour
D
0.25 hour