Future Value of an Annuity for Various Compounding Periods

Find the future values of the following ordinary annuities.

b$.$ FV of $$300$ paid each $3$ months for $10$ years at a nominal rate of $12\%,$ compounded quarterly. Do not round intermediate calculations. Round your answer to the nearest.

$ $$

$ $$ part hearns more than the one in part a over the $10$ years. Why does this occur?