The equation A = p + prt is used to find the accumulated amount, A, of an investment with principal, p, a certain interest rate, r, and over time, t. What is the value for t, after the equation is rearranged?

t equals start fraction cap a minus p over p r end fraction
t equals start fraction cap a plus p over p r end fraction
t equals start fraction cap a minus one over r end fraction
t = A − p − pr