Interest = 83 x 3 x 15 = 3735. This is assuming you meant "simple" interest.
If it is a one-off interest rate then the term is irrelevant and interest is 83 x 15 ie 1245
T = 3yrs
d 2.5 years
14.2 years
556.34
300 :D
72
2.5 years
T = 3yrs
d 2.5 years
14.2 years
$5,249.54
556.34
300 :D
$14,693.28
74 or 75 years
500 invested for 5 years at 7% interest compounded annually becomes 701.28
523.97