The heart of an elephant, at rest, will beat an average 1380 beats in 60 minutes. What is the rate of beats per minutes?

Question

Lisa studies 9 hours for a test and gets the score of 72.  At this rate, how many hours would she have to study to get a score of 93?

Answer 1

Maranita, this is a ratio problem:

 

9/72 =x/93

 

Solve for x