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Mathematics 20 Online
OpenStudy (anonymous):

Mr. Bernard owns a local pizza shop called Pizza Paradise that serves specialty pizzas in the restaurant and for delivery. Due to the popularity of the pineapple bacon pizza, Mr. Bernard has decided to make a larger size of the pizza. The diameter of the small pizza was 10 in. The diameter of the new, large pizza is 13 in. Anthony says the area of the larger pizza is 30% bigger because the diameter is 30% greater. Philip disagrees and says he thinks the area of the pizza is almost 70% bigger. Who is correct? Explain how you know and show your work. Use 3.14 for pi.

OpenStudy (anonymous):

@agent0smith @Bookworm14 @sleepyjess

OpenStudy (sleepyjess):

Hello! Do you know how to find the area of a circle?

OpenStudy (anonymous):

yes

OpenStudy (imsleeziboii):

well what is the formula

OpenStudy (sleepyjess):

Okay, what's that formula we need?

OpenStudy (anonymous):

times?

OpenStudy (imsleeziboii):

|dw:1457119016055:dw|

OpenStudy (anonymous):

I don't understand

OpenStudy (imsleeziboii):

area equals pie (3.14) x radius squared

OpenStudy (jonathan34):

ok what do you need the answer or the writing answer

OpenStudy (anonymous):

just the answer

OpenStudy (imsleeziboii):

what is the radius of the pizza

OpenStudy (jonathan34):

Yeah what is it???

OpenStudy (sleepyjess):

To find the radius of each pizza, divide the diameter by 2

OpenStudy (imsleeziboii):

the radius is half the diameter

OpenStudy (anonymous):

1.57

OpenStudy (imsleeziboii):

so half the first pizza is 5 inches, and second is 6.5 inches

OpenStudy (imsleeziboii):

now input each into the formula

OpenStudy (imsleeziboii):

|dw:1457119284944:dw|

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