Minnie spends 15.5 hours during a two week period to practice for a college entrance exam. At this rate how many hours will she spend during a 5 week period?
15.5 / 2 = 7.75.
7.75 * 5 = 38.75.
If you need to check:
7.75 + 7.75 = 15.5.
15.5 + 7.75 = 23.25.
23.25 + 7.75 = 31.0
31.0 + 7.75 = 38.75.
And there you have it!