Find the amount of interest for $3000 in an account paying simple interest of 5% for 2 years.

Find the amount of interest for $3000 in an account paying 5% interest compounded annually for 2 years.  

 Find i , the rate of interest per period, if $5000 is compounded monthly at 3% annual rate (APR). (Write the answer as a %)

 Find n, the number of interest periods, if $4000 is invested for 7 years at 10% interest compounded quarterly.

 Find the future value of $7000 compounded weekly at 8% APR for 3 years.