Evelyn walks on a treadmill for at least 1 hour but not more than 2 hours. she walks at an average rate of 3.5 miles per hour. the distance evelyn walks in t hours is represented by a function.
r(t)= 3.5t
what is the practical domain of the function?

a. all real numbers.

b. all multiples of 3.5 between 3.5 and 7, inclusive.

c. all real numbers from 1 to 2, inclusive.

d. all integers from 1 to 2, inclusive.