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Anonymous samantacastillo
wrote...
3 weeks ago
1)Water wisteria is an aquatic plant that is easy to care for and reproduces very quickly. A small man-made pond of 350 L contains 150 water wisteria plants. 25 new plants are introduced daily to the pond, while 100 plants are taken out once a week to be sold at local pet shops.



a.  What is the overall population change in a two-week period?

Express your answer rounded to the nearest whole number.

Answer



b.  What is the population density of water wisteria at the beginning?
Express your answer as a value between 0 and 1 rounded to two decimal places.
Answer plants/L






2) Between 2011 and 2016, the population of the city of Edmonton increased from 812 201 to 932 546.

What is the growth rate of the population between 2011 and 2016?

Express your answer rounded to the closest whole number.







3) A sample of raw ground beef initially contained 57 E. Coli bacteria. After six hours, there are 125,456 cells in the sample.



What is the growth rate of the E. coli population?



Express your answer using scientific notation in the form of x.yz x 10d bacteria/hr. 

Answer Answer Answer  Answer
     x             y                 z              d
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3 Replies
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Answer verified by a subject expert
Anonymousbio_man
wrote...
3 weeks ago
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#2

Average Growth Rate = (Final population - initial population)/total time.

Here, the unit of growth rate is either people/year or people/month depending on whether the time is described in years or months, respectively.

For the given question, Average Growth Rate = (932546 - 812201)/(2016-2011) = 120345/5 = 24069 people/year.

Hence, the growth rate is 24069 people/year.

#3

Initial population size, No = 57

Final population size, N = 125,456

Time, t= 6 hours.

Growth rate, r =?

We can calculate growth rate as,

r = (N - No) / t

r = (125456 - 57) / 6

r = 20899.83 cells/hr

It can be expressed as: 2.0899 × 104

= ~ 2.09 × 104 cells/hr
1

Related Topics

Anonymous Author
wrote...
3 weeks ago
Thanks but can you answer number 1 please
Anonymous
wrote...
3 weeks ago
Thanks but can you answer number 1 please

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