Question

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)=3.5tr(t)=3.5t what is the practical domain of the function? all real numbers from 1 to 2, inclusive. all real numbers. all integers from 1 to 2, inclusive. all multiples of 3.5 between 3.5 and 7, inclusive.

Answer 1

The answer is all real numbers from 1 to 2, inclusive.

It states that Evelyn walks on a treadmill for at least an hour. That means that Evelyn does not stop walking unless she reaches the 1st hour. It also states that it does not take her more than 2 hours, meaning, her limit is 2 hours. Thus, she may walk for 1-2 hours, inclusive.  

Answer 2

Just took the test, the correct answer is; All real numbers from 1 to 2, inclusive. 

Hope this helps :)