A nest of ants initially contains 500 individuals. The population is increasing by 12% each week.
a) How many ants will be there after :
I) 10 weeks II) 20 weeks
b)How many weeks will it take for the ant population to reach 2000.

Question

A nest of ants initially contains 500 individuals. The population is increasing by 12% each week. 
a) How many ants will be there after :
  I) 10 weeks      II) 20 weeks
b)How many weeks will it take for the ant population to reach 2000.

hartnn · Answer

u realize this is geometric series with a=500,r=12%=0.12 and n=10,20
apply the sum formula ....

anonymous · Answer

Uhmm, this is not the sum formula, this is just the geometric series, which I am not able to figure out.

hartnn · Answer

oh yea,not the sum formula ,THE 'n' TERM FORMULA..
u know that formula?

anonymous · Answer

Yes, I do, but how do I apply it here? :/ And the answer is coming out to a little more than the given answer.

anonymous · Answer

what if you do this:
unitial population is 500 so 12% of 500 is 0,12 times 500 you get 60 population each week then after 10 weeks the population become 500 +60(10)=1100 u do the same for the 20 weeks

anonymous · Answer

The answer is 1550 :/ 
Thank you for trying though :D

anonymous · Answer

how come i don't get that