Answer:
Step-by-step explanation:
You did leave out a 4 under the r: 1.1063 = (1+r/4)^20
So you'd do both sides to the 1/20 power since 20 • 1/20 = 1
(1.1063) ^ (1/20) = 1 + r/4
Then subtract 1, and multiply by 4
4•[1.1063 ^ (1/20) - 1) = r
$54.67
A really out of focus picture, but I think this might be what you want.
cos A = 16/20 = 4/5
tan A = 12/16 = 3/4
sin A = 12/20 = 3/5
the answer is in the above image
2(x^2+9)
2x^2 +18
Factor out a 2