Participants in an exercise program gradually increase the time they exercise. The first week, they exercise 10 minutes per day. Each week after that, they increase their exercise time by 50%, until they are exercising at least 30 minutes or more per day. In what week of this program should participants begin exercising at least 30 or more minutes per day?

Answer 1

1st week >> 10 min/day
2nd >> 15 min
3rd >> 1.5 * 15 = 22.5 min
4th >> 22.5 * 1.5 = 33.75