Problema Solution
biologist finds that the population of a certain type of bacteria doubles each half-hour. An initial culture has 110 bacteria.
How long will it take for the number of bacteria to reach 7,040?
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Solution:
x = half-hour
7040 = 110(2x)
64 = 2x
26 = 2x
x = 6
Answer = 6(1/2 hr) = 3 hours