Question

find compound interest on 7500 for 2 and a half years at 6 percent per Annum compound anually

Answer 1

i will give u the formula for the 2 years u have to solve it by the compound interest method of p[1+r divided by 100]and power of time that is 2 years 
when u will solve it u have to calculate for the 6 months for this u have to do it with a simple interest formula of p*r*t divided by 100
then add both the amount thats the answer
HOPE IT HELPED 
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and if u dont understand i will tell u in comments box