SOLUTION: A population of frogs doubles every 20 weeks. If the present population is 80 frogs, how many weeks will it take the population to reach 1000 frogs?

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Question 1114124: A population of frogs doubles every 20 weeks. If the present population is 80
frogs, how many weeks will it take the population to reach 1000 frogs?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
y=p%2A2%5E%28x%2F20%29
y, population after x weeks
p, initial population


80%2A2%5E%28x%2F20%29=1000

2%5E%28x%2F20%29=12.5

%28x%2F20%29log%28%282%29%29=log%28%2812.5%29%29

x=20%2Alog%28%2812.5%29%29%2Flog%28%282%29%29

72 weeks and 6 days
If to the nearest day