Question

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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

Answer 1

The answer to your question is about 5.5 hours.

Explanation:

The equation is y = 35(3x)

Data

# of bacteria = 550 = y

time = ? h

Then 550 = 35(3x) substitution

550 = 105x simplifying

x = 5.23 h.