Question

Jake is traveling 15 mph in his boat after three hours how far will he have traveled

Answer 1

ANSWER = 45 Miles

15MPH = Miles Per Hour
If jake is traveling at a constant speed of 15 MPH then you would simply do

15 x 3
(15 being the MPH, and 3 being the number of hours it took)
To get an answer of 45MPH

Answer 2

45 miles

15 miles per hour

__ miles 3 hours

15 x 3