Interest rates fluctuate with the economy. in the 1980s, the highest cd interest rate was over 16%. by 2009, the highest cd interest rates were approximately 5%. a. if $1,000 is invested at 16% interest, compounded continuously, for five years, what is the ending balance? b. if $1,000 is invested at 5% interest, compounded continuously, for five years, what is the ending balance? c. what is the difference between the two ending balances?