$18.75, i’m pretty sure :)
(1/2 + 1/3)^-2
(5/6)^-2
(6/5)^2
= 36/25
$0.75, because she only went over once in January, and twice in February. March was 55 and April was 51. So .25+.50=.75
Year 1: 500 + 0.25*500 = 500 [1 + 0.25]
Year 2: 500*[ 1 + 0.25] * [1 + 0.25] = 500 [1 + 0.25]^2
Year x: 500 [1 + 0.25]^x
Option d: A(x) = 500[1 + .25]^x, where .25 is the interest rate
