t Find an exponential function of the form P(t) = Pon that models the situation, and then find the equivalent exponential model of the form P(t) = Po e Doubling time of 4 yr, initial population of 500. t Find an exponential function of the form P(t) = Pon that models the situation. The exponential function is P(t) = 500(2) t 4 (Use integers or fractions for any numbers in the expression.) Find the equivalent exponential model of the form P(t) = Poen.