Use the formula for the amount, A=P(1+rt), to find December 28, 2016 By Essaypros Use the formula for the amount, A=P(1+rt), to find the indicated quanity. A=$1,056; P=$640; r= 13%; t=? We Deliver Top Quality On Time As Promised! Ready to get started? Just click the button to be directed to a secure page so you can enter the details of your paper.