culture is 40 cells.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section: Chapter Questions
Problem 15T
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A common inhabitant of human intestines is the bacterium Escherichia coli, named after the German pediatrician Theodor Escherich, who
identified it in 1885. A cell of this bacterium in a nutrient-broth medium divides into two cells every 20 minutes. The initial population of a
culture is 40 cells.
(a) Find the relative growth rate.
k =
-1
hr
(b) Find an expression for the number of cells after t hours.
P(t) =
(c) Find the number of cells after 2 hours.
cells
(d) Find the rate of growth after 2 hours. (Round your answer to the nearest integer.)
cells/h
(e) When will the population reach a million cells? (Round your answer to two decimal places.)
h
Transcribed Image Text:A common inhabitant of human intestines is the bacterium Escherichia coli, named after the German pediatrician Theodor Escherich, who identified it in 1885. A cell of this bacterium in a nutrient-broth medium divides into two cells every 20 minutes. The initial population of a culture is 40 cells. (a) Find the relative growth rate. k = -1 hr (b) Find an expression for the number of cells after t hours. P(t) = (c) Find the number of cells after 2 hours. cells (d) Find the rate of growth after 2 hours. (Round your answer to the nearest integer.) cells/h (e) When will the population reach a million cells? (Round your answer to two decimal places.) h
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