Y= 58x + 55
They charge 58$ per hour therefore 58 should correlate with x and since when don’t know y (the total amount) its y= and then just add 55
SinФ=-12/13
cosФ=Base/hypotenus
(hy)^2-(perpendicular)^2=(base)^2=13^2-12^2=5
cosФ=-5/13
This is a question on Present Value of Annuity and we seek the periodic withdrawal.

where:
FVA = Future value of annuity
PMT = Periodic Withdrawal
i = interest/discount rate
n = no of years
m = no of compundings per interest period

PMT = $22.01
I did this question wrong so I had to edit it.... sorry :s.