For which of the following would it be appropriate to use positive integers for the domain of the function? (select all that apply)

What is the sum of these mixed numbers 2 1/8 + 4 3/8

What is the base of 1/9 to the power of 2

Fa bus driver leaves her first stop by 7: 00 a.m., her route will take less than 37 minutes. if she leaves after 7: 00 a.m., she estimates that the same route will take no less than 42 minutes. which inequality represents the time it takes to drive the route, r?