The formula to get the volume of a cone is
V = (1/3)πr²h
where V is the volume
r is the radius at the base
h is the height
No values are given but simple substitution should give the correct answer.
In my opinion I think that you have to multiply 13.55 by 8 ounces to find how much she needs to pay.
Answer:

Step-by-step explanation:
we know that
5 boxes of cereal costs $12.50
so
Using proportion
Find how much will 18 boxes cost
Let
x -----> the cost of 18 boxes
