You are checking the results of a phone app that counts calories. When someone eats, it is recorded as positive calories. When s
omeone exercises, it is recorded as negative calories. What is the number of net calories for a person with the following record? Description Calories Bike, 30 min -270 Breakfast 560 Lunch 770 Walk, 45 min -80 Dinner 990 Ping-pong, 30 min 130