Question 578197

b=100(2^t)

51,200 = 100 (2^t)   

512 = 2^t

**take the log(base 2) of both sides

log(512) = log (2^t)

9 = t

so 9 'periods' of time, to get minutes:

minutes = 15t = 15 x 9 = 135 minutes