Theinterestiscompoundedquarterly.Principal($):8000Interestrate(%p.a.)：12Depositperiod(month):6Amount($):Compoundinterest($):Findtheunknown.**过程**

Question

The interest is compounded quarterly.
Principal($):8000
Interest rate (%p.a.)：12
Deposit period (month):6
Amount($):
Compound interest($):
Find the unknown.
**过程**

Answer 1

因为
The interest is compounded quarterly.（利益是按每季度算复利）
amount 8000*(1+12%)^6=15790.6
compound interest 8000*(1+12%)^6-8000=7790.6