Question

Shea works in a lab. It takes Shea 30 minutes to calibrate her lab instrument. If she calibrated it 5 times last month, how many hours did she spend calibrating it?

Answer 1

2 and a half hours

Explanation:

since it takes 30 min to calibrate, and she did it 5 times, that is 5x30 which is 150 minutes, 150 minutes is 2 and a half hours