Apizza shop charges customers based on the area of the pizza they order. the cost of a pizza in dollars can be represented
by so) - 0.1 ser? where r is the radius of the pizza in inches.
what is the diameter of a pizza that costs $26.32? round to the nearest hundredth.
o 9.15 inches
o 18.30 inches
o 83.72 inches
o 217.63 inches

For this case we have that the cost of each pizza is given by the following function:

Where:

r: It's the radius of the pizza

IF a pizza cost $26.32 we have:

We cleared the radius, using :

We choose the positive value:

So, the radius of the pizza is

Then, the diameter is:

Finally, the diameter of the pizza is:

Option B

The correct answer is B. 18.30 inches

Step-by-step explanation:

1. Let's review the information provided to us to answer the question correctly:

Cost of the pizza = $ 0.10 * π * r², where r = radius of the pizza in inches  

2. What is the diameter of a pizza that costs $26.32 ?  

Let's recall the formula of the area of a circle, in this case, the area of the pizza:  

Area = π * r², therefore the constant 0.10 that is multiplying the area of the pizza, is the cost of the pizza in dollars per square inch.

Cost of the pizza = $ 0.10 * π * r²

Replacing with the values we have:

26.32 = 0.10 * 3.1416 *  r²

26.32 = 0.31416 * r²

r² = 26.32/0.31416

r² = 83.78

r = √ 83.78

r = 9.15 inches ⇒ d = 9.15 * 2 = 18.30

The correct answer is B. 18.30 inches

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