In a certain culture of bacteria the rate of increase is proportional to the number present. a. If it is found that the number doubles in 6 hours, how many may be expected at the end of 18 hours? b. If there are 100 at the end of 4 hours and 800 at the end of 8 hours, how many were at the beginning?

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.7: Applications
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In a certain culture of bacteria the rate of increase is proportional to the number present.
a. If it is found that the number doubles in 6 hours, how many may be expected at the end of 18 hours?
b. If there are 100 at the end of 4 hours and 800 at the end of 8 hours, how many were at the beginning?
Transcribed Image Text:In a certain culture of bacteria the rate of increase is proportional to the number present. a. If it is found that the number doubles in 6 hours, how many may be expected at the end of 18 hours? b. If there are 100 at the end of 4 hours and 800 at the end of 8 hours, how many were at the beginning?
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