Chapter 1.2, Problem 36E

Calories and Exercise The chart on page 17 shows the calories burned per hour for an average person who weighs 150 lb.

a. Estimate the number of calories Phyllis, who weighs 150 lb, burns in a week if she lifts weight for 2 hours each week and jogs at 5 miles per hour for 4 hours each week.

b. Estimate the difference in the calories Phyllis will burn each week if she runs for 4 hours at 8 miles per hour rather than walking for 4 hours at 4 miles per hour.

c. Assume Phyllis jogs at 5 miles per hour for 3 hours and bicycles at 13 miles per hour for 3 hours each week Estimate the number of calories she will burn in a year from these exercises.

Activity	Calories* per Hour
Running, 8 mph	920
Bicycling, 13 mph	545
Jogging, 5 mph	545
Air-walking	480
Stair-climbing	410
Weight-lifting	410
Walking, 4 mph	330
Casual bike riding	300
*For a 150-lb person.