Answer:
Plan A: $160, Plan B: $152
Explanation:
PLAN A
add 20 dollars a year you would get
year one = $120
year two = $140
year three = $160
PLAN B
multiple your value by 1.15 (adding 15%) each year
year one = 100 x 1.15 = 115
year two = 115 x 1.15 = 132.25
year three = 115 x 1.15 = 152.08