A function rule could simply be: c = 420h , where c is the total number of calories burned and h is the number of hours riding at 15 mi/hr.
All you need to do is plug in the number of hours that he rode at this rate and multiply it by 420.
Answer: 78
Step-by-step explanation:
The rest of the answers are too small to be the length.
I don't understand this, sorry
Multiply 6 by 60 then divide by two which will get you 180.