A. Principal (beginning balance) is $1,100 at 2.5% compounded quarterly for 2 years {PxR/4} Quarter Principal (P) Rate (R) Interest earned Ending (Beginning [time] (change from % Balance balance) to decimal) 1st 2nd 3rd 4th 5th 6th 7th 8th B. Principal (beginning balance) is $250 at 7% compounded semi-annually for 2 years {PxR/2} Month Principal (P) Rate (R) (Beginning [time] balance) Ending Balance Interest earned (change from % to decimal) 6th 12th 18th 24th C. Principal (beginning balance) is $500 at 3% compounded quarterly for 1.5 years {PxR/4} Quarter Principal (P) Rate (R) (Beginning [time] balance) Ending Balance Interest earned (change from % to decimal) 1st and 3rd 4th 5th 6th