APES: Doubling Time (Using the Rule of 70) Calculations:
Name
APES: Doubling Time (Using the Rule of 70) Calculations
Doubling Time - When a population grows exponentially, the time it takes for the population to double, called “doubling time,” can be approximately calculated using the “Rule of 70,” which in formula form looks like this:
Doubling Time = 70/growth rate
where doubling time is in years, and growth rate is expressed as a percentage. NOTE: 5% must be entered as 5 instead of 0.05.
CALCULATIONS:
1) Given a 2010 world population growth rate of about 1.30% per year, how long would it take the world’s population to double? By what year would this doubling occur?
2) If the population growth rate continues at 1.30%, and you are 17 years old now, how old will you be when the population doubles?
3) Scientists and Demographers are fairly sure that the growth rate will slow in both developing and developed countries. With that in mind, if the growth averages about 1.10% over a doubling time period, how long will it take the world’s population to double? By what year would this doubling occur, and how old would you be if you are 17 years old now?
4) If the doubling time for the world’s population is 56 years, what will be the growth rate over this time period?
5) The current world population is about 6.5 billion. Using the growth rate calculated in #4, by what year will the world’s population double? How old will you be if you are 17 years old now? (Don’t get fooled by this question, only use relevant information when making your calculation)
Some properties and thoughts about doubling time:
> The larger the “growth rate”, the faster the doubling time.
> “growth rate” varies considerably among different organisms: small
bodied organisms grow faster and have larger rates of
population increase than large-bodied organisms.
(Ex. Think bacteria vs. an elephant)
> Do populations REALLY grow exponentially? .... Sometimes, but not usually for long!
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- apes doubling time using the rule of 70 calculations
- instruction for case 5 faculty pages
- chain weight gdp calculations holy cross
- equations of radioactive decay and growth
- programming microsoft excel to graph rate of improvement
- economic growth using maddison data depauw
- using spreadsheet to determine value using residual income
- san jose state university
- m m population growth with excel
Related searches
- why is the rule of law important
- rule of law in the united states
- cell population doubling time calculator
- cell growth doubling time formula
- exponential growth doubling time calculator
- population doubling time calculator
- the technique of using systematic desensitization involves
- benefits of using the cloud
- the irs rule of 55
- the benefit of using internet
- derivative using product rule calculator
- explain the rule of law