Joan invests $800 at 12.5% per anum compound intrest compounded daily.What is the amount of intrest at the end of first year?

A=P(1+i)^n
P=800
i=0.125/12 (12.5/100 to get from percentage to normal and /12 to convert from year to months)
n=12
A=800(1+0.125/12)^12
=905.93
Therefore , Interest = 905.93-800
=105.93