Use the formula for the amount, A=P(1+rt), to find the indicated quantity. A=$841;P=$580;r=15%;t=? t= year(s) (Type an integer or a decimal.) Use the continuous compound interest formula to find the indicated value. P=$4,000;r=3.69%;t=3years;A=? A=$ (Round to two decimal places as needed.) Use the continuous compound interest formula to find the indicated value. A=$7,700;r=7.73%;t=10years;P=? P=$(Roundtotwodecimalplacesasneeded.)