A biologist monitoring an infestation of grubs records an initial population of 400 grubs per hectare and, two years later, a population of 950 grubs per hectare. Use the growth equation A = Apekt a) Calculate the growth constant, k. b) Determine the instantaneous rate at which the number of grubs is increasing after 10 years of infestation. c) Determine the doubling time for the population. d) Rewrite the growth equation, A(t), with the base of 2