ASAP!!! PLEASEEE!!!

A biologist is researching a newly-discovered species of bacteria. At time t = 0 hours, he puts 100 bacteria into what he has determined to be a favorable growth medium. Six hours later, he measures 240 bacteria. Assuming exponential growth, what is the equation to determine the number of bacteria after t hours?

A) y=100(240)^t

B) y=100(1.681)^t

C) y=100(2.4)^t

D) y=100(1.157^t