Answer:bellow hope I helped most likely c
Step-by-step explanation:
If 2% per year
480 x 1.02 = 489.6 first year
489.6 x 1.02= 499.392. Second year
499.392 x 1.02 = 509.37984 third year
If 2 % per all 3 years
480 x 1.02 = 489.6 all 3 years
If 2 % per each month
480 x 1.02 = 489.6 first month
489.6 x 1.02 = 499.392 second month
499.392 x 1.02 = 509.37984 third month
509.37984 x1.02 = 519.5674368 forth month
519.5674368 x1.02 =529.958785536 fifth month
529.958785536 x 1.02 =540.5579612467 sixth month
540.5579612467 x 1.02 = 551.3691204716 seventh month
551.3691204716 x 1.02 =562.396502881 eigth month
562.396502881xl x1.02 = 573.6444329386 nineth month
573.6444329386 x 1.02 =
585.1173215974 tenth month
585.1173215974 x 1.02= 596.8196680293 11th month
596.8196680293 x 1.02=608.7560613899 12 months (1 year)
608.7560613899 x1.02 = 620.9311826177 1st month 2nd year
620.9311826177 x 1.02= 633.3498062701 2nd month 2nd year
633.3498062701 x 1.02 = 646.0168023955 3rd month 2nd year
646.0168023955 x 1.02 =658.9371384434 4th month 2nd year
658.9371384434 x 1.02= 672.1158812123 5th month 2nd year
672.1158812123 x1.02 = 685.5581988365 6th month 2nd year
685.5581988365 x 1.02 =699.2693628132 7 th month 2nd year
699.2693628132 x1.02 =713.2547500695 8th month 2nd year
713.2547500695 x 1.02 =727.5198450709 9th Month 2nd year
727.5198450709 x 1.02 =742.0702419723 10th Month 2nd year
742.0702419723 x 1.02 =756.9116468117 11 th month 2nd year
756.9116468117 x 1.02 = 772.0498797479 12th month 2nd year (2 years)
772.0498797479 x 1.02 = 787.4908773429 1st month 3rd year
787.4908773429 x 1.02 =803.2406948898 2nd month 3rd year
803.2406948898 x 1.02 = 819.3055087876 3rd month 3rd year
819.3055087876 x 1.02 = 835.6916189634 4th month 3rd year
835.6916189634 x 1.02 =852.4054513427 5th month 3rd year
852.4054513427 x1.02 = 869.4535603696 6th month 3rd year
869.4535603696 x 1.02 =886.842631577 7th month 3rd year
886.842631577 x 1.02= 904.5794842085 8th month 3rd year
904.5794842085 x 1.02 = 922.6710738927 9th month 3rd year
922.6710738927 x 1.02 = 941.1244953706 10th month 3rd year
941.1244953706 x1.02 = 959.946985278 11th month 3rd year
959.946985278 x 1.02 =979.1459249836 12th month 3rd year (3 years)
in and 
in could be measures found using a ruler with eighth inches marked, because those decimals can be written in terms of eighth fractions.
in, is not a possibility because 0.1 cannot be written as a fraction of 8 that is marked on the ruler.