Register to reply 
Relative growth rate problem 
Share this thread: 
#1
Oct2506, 03:12 PM

P: 48

A common inhabitant of human intestines is the bacterium Escherichia coli. A cell of this bacterium in a nutrientbroth medium divides into two cells every 20 minutes. The initial population of a culture is 90 cells.
the question asks to find the relative growth rate, if we measure t in hours. im not exactly sure what they are asking for? if someone can point me in the right direction. 


#2
Oct2506, 03:14 PM

Sci Advisor
HW Helper
PF Gold
P: 12,016

What does growth rate mean, and what does "relative growth rate" mean?



#3
Oct2506, 03:17 PM

P: 48

well growth rate is that rate at which a certain population increases or decreases. so relative growth rate is the rate at which a population increases or decreases relative to time?



#4
Oct2506, 03:53 PM

Sci Advisor
HW Helper
PF Gold
P: 12,016

Relative growth rate problem
No, "relative growth rate" means the growth rate relative to the SIZE OF THE POPULATION at the same time!
1. So, if the population at time t is x(t), what is its growth rate at time t? 2. And what is its relative growth rate? 3. What type of growth do you think the bacterium population experiences? 4. What type of function must x(t) be? 5. Use the info to determine x(t)! 6. Calculate the relative growth rate! 


Register to reply 
Related Discussions  
Century Growth Problem: Rate of Change  Introductory Physics Homework  3  
Bacteria growth rate  Differential Equations  4  
Growth rate  Linear & Abstract Algebra  0  
Black hole question: apparent rate of growth as seen by external observers  Special & General Relativity  6  
Annual and daily growth rate  General Math  5 