The regular period is 2pi. If you look up or type in a graphing calculator you can see that's when the sine function starts to repeat itself.
Just do 45x0.2 then take that number off of $45 thats your answer
Answer:
A = P(1+r÷100)^n
where A is amount after some days
r is the rate
n is the number of years
p is the principle (the amount of money before the interest)
A = 5000 ( 1 + 12÷100)^5
A = 8811.70
A = 8812
