Suppose we have a container in which there is an amoeba which splits into two halves in one minute, each one immediately growing to the same size as the parent. In 77 minutes the multitude of amoebae completely fill their container. To the nearest minute, how much time was needed to fill half of the container?

Question

cwrw238 · Answer

this is a geometric progression in which the common ratio =  2 and first term = 1
use the formula for sum of n terms

anonymous · Answer

76 after some thinking.
Refer to the attached Mathematica solution.

cwrw238 · Answer

right because it doubles its numbers avery minute!

cwrw238 · Answer

no nedd to use the formula!!

anonymous · Answer

Thank you for the medal.