The number of hours, t, that bacteria spread 10-fold can be modeled by the equation B(t) = B0(10)^7t. There are 20 bacteria present initially and a biologist wishes to find out how many hours will elapse until there are 3,340 bacteria present. What is the exact value for the number of hours elapsed, t, in the equation 3,340 = 20(10)^7t?
A.) t= log 16.7/7
B.) t=log 3,340/7 log 200
c.) t= log167/7
d.) t=log 167/log7