Tammy has begun an exercise program. She worked out five days the first week for 28 minutes, 32 minutes, 21 minutes, 38 minutes and 42 minutes. Round each amount to the nearest 10 to find an estimate of the total number of minutes Tammy exercised during the week. A. 110 min.
B. 140 min.
C. 160 min.
D. 190 min.

The correct answer is C. 160 minutes.

Step-by-step explanation:

Since Tammy has begun an exercise program, and she worked out five days the first week for 28 minutes, 32 minutes, 21 minutes, 38 minutes and 42 minutes, to find an estimate of the total number of minutes Tammy exercised during the week, rounding each figure to the nearest tenth, the following calculation must be performed:

28 + 32 + 21 + 38 + 42 = X

30 + 30 + 20 + 40 + 40 = X

160 = X

Thus, the estimated time of exercise that Tammy performed was 160 minutes.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.