text: You need to take the natural log of both sides to solve for t.  \n\nA = Pe^(rt)\n\nln(A) = ln(Pe^(rt))\n\nln(A) = ln(P) + ln(e^(rt))\n\nln(A) = ln(P) + rt\n\nrt = ln(A) - ln(P)\n\nrt = ln(A/P)\n\nt = (1/r) ln(A/P)\n\nHope that helped!\n\n~ ♥ ~