Finance: Compound interest

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  1. Bianca deposits $1,000 in a savings account with an annual interest rate of
    12%. How much money will she have in 20 years, if the interest is compounded:
    1. daily
    2. monthly
    3. quarterly
    4. semi-annually
    5. annually
  2. A $1000 investment, compounded quarterly, doubles in value over a period
    of 8 years. Find the interest rate per annum.