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anonymous
 5 years ago
Use the rule of 70 to find the approximate doubling time for a population whose annual growth rate is 0.7% (U.S.)? and 1.2% (World)?
anonymous
 5 years ago
Use the rule of 70 to find the approximate doubling time for a population whose annual growth rate is 0.7% (U.S.)? and 1.2% (World)?

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i thought it was the rule of 72! it says doubling time is \[\frac{72}{r}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so first one would be \[\frac{10}{.7}=100\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0second would be \[\frac{70}{1.2}=58.3\] rounded

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0there is rule of 70 I just dont have my book for the formula

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i think 72 is closer, but it is just an approximation in any case

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0fine use 70. close enough. it is rule of thumb, not an exact answer.
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