exponention function

Question

The number of bacteria present in a culture at time t is given by the formula N=20e^0.35t , where t is in hours. How many bacteria are present initially (that is when t = 0)? How many are present after 24 hours? How many hours does it take for the bacteria population to double? (Round your answers to the nearest hour).

Answer 1

at t- 0, 20 bacteria are present

at t = 24 N = 20e^0.35(24)

2 = e^0.35t, use ln to solve.