The number of bacteria in a petri dish culture triples every two days. Initially there were 250 bacteria present. Which equation models the number of bacteria B after T days? A. B=250•3^t+2

B. B=250•3^2t

C. B= 250•3^t/2

D. B=250•3^t^2

please only respond if you know the answer :)

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Which expression gives the exact value of x?