The cost of 2 bottles of ketchup is $7.96. what is the cost of each bottle of ketchup?

$1.64
$2.65
$3.98
$5.96

This is simple division. 
You know 2 bottles cost a total of $7.96. You want to find how much each individual bottle costs on it's own. You take 7.96, and divide it by 2 in order to find this. 7.96/2=3.98
Each bottle costs $3.98
The third choice is correct
~Hope this helps!