solve problems, using a scientific calculator, that involve the calculation of the amount, (also referred to as future value, ), the principal, (also referred to as present value, ), or the interest rate per compounding period, , using the compound interest formula in the form [or ] Sample problem: Two investments are available, one at 6% compounded annually and the other at 6% compounded monthly. Investigate graphically the growth of each investment, and determine the interest earned from depositing $1000 in each investment for 10 years.