A 120 lb. student playing volleyball burns 2.7 cal. per min. If she plays for 30 min., how many cal. r burned?

Question

Use the following information. The number of calories burned while doing an activity can be expressed by "rm", where "r" is the rate of calories burned and "m" is the number of minutes spent doing the activity.

Answer 1

2.7 x 30 = 81 cal burned

Answer 2

                           1 min                          2.7 cal

                          30                                  x

x=30X2.7/1=81 calories.

Answer 3

30 minutes of playing volleyball  is burned at a rate of 2.7 calories/minute  therefore minutes* calories burn per minute= total calories burned= 2.7*30=81 calories burned

Answer 4

I'm c**p at math, but I'm gonna give this a try anyway. So R=2.7, and M=30. So the expression is (2.7)(30). So you multiply and the product is 81. Therefore, the player burns 81 calories per half hour.

Is that right? Hope so.