1. The rational function C(t)=4t t2 8 gives the concentration (in mg/ml) of a drug t hours after administered by an I. V. A graph of this function is also given below.

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance