You are able to purchase pizzas with either a 9", 14" or 18" diameter. Assuming 4 people will be sharing the pizza, how much more pizza will you get to eat if you order the 18" opposed to the 9" or 14"?

Question 2

If one of your friends has to cancel last minute, how much more pizza will each person get for all of the different sizes?

Directions

CD is the measure of the radius.
The slider allows you to change how many people will be sharing the pizza.
a is the area of the pizza based on the radius.
pizza is the amount of pizza per person based on the area and number of people.