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 April 11th, 2012, 10:00 AM #1 Newbie   Joined: Apr 2012 Posts: 3 Thanks: 0 Exponential growth rate? Help please Suppose that the number of bacteria in a certain population increases according to an exponential growth model. A sample of 1800 bacteria selected from this population reached the size of 2029 bacteria in three hours. Find the continuous growth rate per hour. Write your answer as a percentage. Do not round any intermediate computations, and round your percentage to the nearest hundredth.
April 11th, 2012, 10:42 AM   #2
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Re: Exponential growth rate?

Quote:
 Originally Posted by Campus Help please Suppose that the number of bacteria in a certain population increases according to an exponential growth model. A sample of 1800 bacteria selected from this population reached the size of 2029 bacteria in three hours. Find the continuous growth rate per hour. Write your answer as a percentage. Do not round any intermediate computations, and round your percentage to the nearest hundredth.

Hi Campus,

$y=a(1+r)^x$

a = the initial amount before measuring growth.
r = the growth rate per time period written as a decimal.
x = the number of time intervals
y = ending amount after growth period

$2029=1800(1+r)^3$

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# continuous exponential growth model growth rate parameter

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