SOLUTION: 1. A cell divides into two identical copies every 4 minutes. How many cells will exist after 3 hours?

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: 1. A cell divides into two identical copies every 4 minutes. How many cells will exist after 3 hours?       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 154681: 1. A cell divides into two identical copies every 4 minutes. How many cells will exist after 3 hours?
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
By Ratio & Proportion:
Let X= # of copies:
2copies%2F4min=X%2F3hrs
2copies%2F4min=X%2F180min, cross multiply
2%2A180=4X
360=4X --------> cross%28360%2990%2Fcross%284%29=cross%284%29X%2Fcross%284%29
X=90copies
Thank you,
Jojo