Answer:
Step-by-step explanation:
a) A = 500 (1 + .04)^1 = 520
b) A = 500 (1 + .04)^2 = 540.8
c) A = 500 (1 - .04)^1 = 480
d) A = 500 (1 - .04)^2 = 460.8
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