at 9:00 am scott starts jogging at 5 mi/hr at 9:20 brenda starts off after him how must brenda run in order to overtake home at 9:30

Answer 1

In half an hour, Scott has gone 2 1/2 = 5/2 miles

10/60 = 1/6 of an hour.

d = rt, so r = d/t

r = (5/2)/(1/6) = (5/2)6 = 30/2 = 15 mph

That's well more than a jog!