The amount of money in a bank account increased by 21.5% over the last year. If the amount of the
money at the beginning of the year is represented by n, which expression represents the amount of
money in the bank account after the increase?
A. n + 0.215n
B. n + 21.5n
C. 0.215n
D. 21.5n

Answer is A because;

Let n be the money, and 21.5% the increase in percentage.

n (money) + n (money) (0.215) (percentage of n)

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.

here is a big fat