Can someone check my answers, please?

Term compound interest. C present value of a single sum. e future value of a single sum. f present value of an annuity. b future value of an annuity.d interest rate. d Time. a Principle. b definition a. the value of an investment at some future point and time. b. the original amount borrowed or invested c. the number of years that the principle is borrowed or invested d. an annual percentage of the principle e. the current value in today's dollars of a serious of equal dollar payments coming at the end of each time period for a specified number of time periods f. the effect of earning on interest, resulting from the reinvestment of interest paid on an investment principle