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A scientist counts 35 bacteria present in a culture and finds that the number of bacteria triples each hour. The function y = 35 • 3x models the number of bacteria after x hours. Estimate when there will be about 550 bacteria in the culture.

I think it's about 2.5 hours.

Other answer options:

about 5.5 hours

about 4.5 hours

about 3.5 hours