18÷3=6 which number is the quotient?

Do you mind if you guys me with this question i’m on number 8

Evaluate the function , when d = {9, 15, 30}. r = {5, 7, 12} r = {6, 10, 15} r = {6, 10, 20} r = {5, 12, 20}

Find y to the nearest hundreds place