Question

a pumpkin pie cost $12.55 at Bobby's Bakery. If the pie has a diameter of 12 inches, what is the cost per square inch of the pie? use 3.14 for π

Answer 1

d = 12
r = d/2
r = 6
6^2 = 36
36 * 3.14 = 113.04
12.55 / 113.04 = .11102264685
Round that answer to the nearest hundredth
The cost per square inch of the pie is 11 cents.

Answer 2

Cost per square inch of the pie is 11 cent .

Explanation:

Formula

`Area\ of\ a\ circle = \pi r^(2)`

Where r is the radius of a circle .

As given

A pumpkin pie cost $12.55 at Bobby's Bakery.

lf the pie has a diameter of 12 inches .

`Radius = (Diameter)/(2)`

`Radius = (12)/(2)`

Radius = 6 inches

Put all the values in the formula

`Area\ of\ a\ circle =3.14* 6* 6`

= 113.04 inches²

Thus

`Cost\ per\ square\ inch\ of\ the\ pie = (Cost\ of \a \ pumpkin\ pie)/(Total\ area\ of\ a\ pumpkin)`

Put all the values in the above

`Cost\ per\ square\ inch\ of\ the\ pie = (12.55)/(113.04)`

`Cost\ per\ square\ inch\ of\ the\ pie =\$ 0.11\ (Approx)`

As

1 dollar = 100 cent

0.11 dollar = 0.11 × 100

= 11 cent

Therefore the cost per square inch of the pie is 11 cent .