The principal P is borrowed and the loan's future value A at time t is given. Determine the loan's simple interest rate r to the nearest tenth of a percent.

P= $4,800, A= $4,902, t= 3 months

(Round to the nearest tenth of a percent.)

Determine the present value P you must invest to have the future value A at simple interest rate r after time t.

A= $17,000, r= 5.5%, t= 3 years.

The present value that must be invested to get $17,000 after 3 years at an interest rate of 5.5% is $? (Round up to the nearest cent.)

Determine the present value P you must invest to have the future value A at simple interest rate r after time t.

A= $4,000, r= 12.5% t= 9 months

(Round up to the nearest cent.)