What operation can you use to solve the equation? explain. x + 8 = 4 a. addition; addition is the opposite of subtraction. b. subtraction; subtraction is the opposite of addition. c. addition; the equation has a plus sign. d. division; division gets the variable alone on the left side.

B. Subtraction; subtraction is the opposite of addition (to cancel out the 8)

Part A: The price of Product A is increasing by 25% per year. It starts at $72, then is multiplied by 1.25 per year, as shown by the equation f(x) = 72*(1.25)^x.
Part B: We can divide each price by the price the previous year:
84.5 / 65 = 1.3
109.85 / 84.5 = 1.3
142.81 / 109.85 = 1.3
These consistently show that each year, the price is multiplied by 1.3, or an increase of 30% per year. Therefore, Product B has a greater percentage change in price each year (30% > 25%).