This is a "rate of pay" problem. The amount earned is equal to the (rate of pay) times the (number of hours worked).
Let the income be represented by "i". Then the formula is i = ($10.91/hour)*w, where w is the number of hours worked and has the unit of measurement "hours."
Answer:
42 because 3 tens is 30 and 12 ones is 12. so you do 30 + 12 = 42
F^-1(x)= (x-4)/-8 because it's just finding the inverse function
