Posted by Diana on November 06, 2002 at 00:55:23:
The formula 5 * 2^(kt/.69) describes how an initial population of 5 billion will grow at a constant per capita rate of k persons per year per person.
Use this formula to determine how many years t it will take for the population to double, to 10 billion.
I know I can let y = 2^u and let u = kt/.69 and that the derivative is then 2^u (I did 2^u ln2* 1/.69). But I have no idea what to do next. Can anyone tell me how I am supposed to go about getting the kt down from exponent world? I have no idea how to isolate that variable.
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