No she is not right.
Dividing blocks by minutes would be 12/36 = 1/3
The ratio would be 1:3 meaning she runs 1 block every 3 minutes.
J + 3 + 2j ≤ 18
3j + 3 ≤ 18
3j ≤ 15
j ≤ 5
jimmy's age is 5 years or less
Get all d's on one side and numbers on the other
4d-4-4d=5d-4d-8
-4=d-8
-4+8=d-8+8
4=d
we can see that both have one horizontal asymptote, hence the answer is B.