Which statement shows the associative property of addition?

a.
if m + 3 = 18, then 18 = m + 3

b.
(u + 7) + 13 = u + (7 + 13)

c.
21 + 2y = 2y + 21

d.
3 · (5 · x) = (3 · 5) · x

the answer is 200

step-by-step explanation:

the way the question is worded, it seems to imply the $264 interest is simple interest, not compound interest.

the simple interest for 2 years is $264; the simple interest for 1 year is $132.

$132 interest on a $600 investment means an interest rate of (132/600)*100 = 22%.

the value of $200 at 22% interest compounded annually for three years is

200%281.22%29%5e3

the amount of interest is that value, minus the original $200.

r and t.

both are 64 degrees.