circles

Mario wants to put your pepperoni

crust pricing formula to the test

So, is this “Pi” thing just theoretical, or does it actually work

in the real world? It’s time to put your formula to the test.

you are here 4 217

Mario wants to charge 5 cents per piece of pepperoni. How much does he need to

add to the price of the following orders if they all want the new pepperoni crust? (Use

your calculator and round up or down to the nearest whole piece of pepperoni.)

1: A 14" TexMex with extra jalapenos

2: A 20" “The Works” (hold the mushrooms)

3: Two 6" kids’ Hawaiians, one with extra pineapple

I can’t be charging my customers

wrong prices—understand? So, we’ll

have a go and see if it works. I tell you

the orders, you work out the pepperoni

edge prices, and then when I make the

pizza we’ll see if you were right!

calculate pie costs with pi

218 Chapter 5

Mario wants to charge 5 cents per piece of pepperoni. How much does he need

to add to the price of the following orders if they all want the new pepperoni crust?

(Use your calculator and round up or down to the nearest whole piece of pepperoni)

1: A 14" TexMex with extra jalapenos

2: A 20" “The Works” (hold the mushrooms)

3: Two 6" kids’ Hawaiians, one with extra pineapple

14 x ∏ = 43.98 = 44 pieces of pepperoni

44 x 5 cents = $2.20

20 x

∏ = 62.83 = 63 pieces of pepperoni

63 x 5 cents = $3.15

2 x 6 x

∏ = 37.7 = 38 pieces of pepperoni

38 x 5 cents = $1.90

It’s amazing! I made the pizzas and

you were exactly right about how

much pepperoni I used each time.

You’re a smart one. I bet you eat a

lot of fish, eh? Thank you for your

help!

T

his order is f

or

2 p

izzas.

If you f

orgot t

o round

your p

i

ec

es of p

epp

eroni

befor

e y

ou w

orked

out the pr

ice y

ou’d

hav

e slightl

y dif

f

er

ent

answers here—like $3.14.

Remember t

o round a

t

the r

ight time!

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