Question

An English instructor asserted that​ students' test grades are directly proportional to the amount of time spent studying. Lisa studies 2 hr for a particular test and gets a score of 73. At this​ rate, how many hours would she have had to study to get a score of 92​?

Answer 1

about 2.521 hours

Explanation:

To get a grade that is 92/73 times as high, she would need to study 92/73 times as long, so ...

(92/73)·2 hours = 184/73 hours = 2 38/73 hours ≈ 2.521 hours

_____

That's about 2 hours 31 minutes 14 seconds.