Jackie is a runner, she runs for at least 1 minutes but not more than 2 hours. she runs at an average of 6.2 mph. the function that models the distance she ran for t hours is d(t)=6.2t. what is the practical range of the function?
a. all real numbers
b. all integers
c. all integers from 6.2 to 12.4, inclusive
d. all real numbers from 6.2 to 12.4, inclusive