Question 351741
Hello, 
Let's first find how long it takes for the first one to get to the finish lime. 
We divide 72 by 4.23 to get:
17.02 seconds (rounded off)
Now multiply this by 3.99999 to get:
68.08 cm the second ant has traveled.  
So we subtract this from 72 cm to get:
3.92 cm behind the first ant. Close race. 
Make sense?
RJ
www.math-unlock.com