C is the answer. Hope you get a good grade
What does r mean. if r means multiply blank than 3*4 = 12
If you want to keep it technical, the normal “/unit rate” for running is minutes per mile. You can use dimensional analysis like I did below to find the answer. You should get 11.45 min/mile or about 11 min 25 sec per mile
There are four pairs (m,n) that work: (5,10), (6,6), (8,4), and (12,3).