A woman burns 250−50t cal/hr while walking on her treadmill. Her caloric intake from drinking Gatorade is 85t calories during the t'th hour. Find the net decrease in calories after walking for 4 hours

Answer 1

accumulation = in - out for energy, mass, concentration...

dE/dt = 85t - (250 - 50t) = 135t -250

E = integral from 0 to 4 of (135t -250 dt This is the increase in E - flip the sign for decrease in cal