Convert the given decimal form of an interest rate to a percentage. 0.29 0.29= % Use the formula for the amount, A=P(1 + rt), to find the indicated quantity Where, A is the amount Pis the principal r is the annual simple interest rate (written as a decimal) t is the time in years. P = $3,900; r= 10%; t = 3 years; A = ? A=$ (Type an integer or a decimal.)