It would be 13... if I did my math right.
Total hours of hiking is 15.12 miles
Time taken is 6.3 hours
The number of miles hiked per hour would be
Total hours ÷ time taken
=2.4 miles
So Megan has hiked 2.4 miles every hour
Integers and Rational Numbers, it is because if -11 is a Integer, it also has to be a Rational number. But your actual answer is Integers.