Dr. Cheeks tries to run at least 45 rotations on her hamster wheel each week. She has already run 6 rotations. Which inequality shows how many more rotations, r, she would have to run to meet her weekly goal?

A. r-6>45

B. r-6>45

C. r+6>45

D. r+6<45

C is the best answer, although an even better answer would be r+6 ≥ 45. We know that she runs at least 45 rotations each week and she's already completed 6 rotations. Since the value of r is how many more rotations she needs to run to meet her weekly quota of rotations, C is the best answer since she can run 45 rotations or more to meet her quota.