Answer:
(b) $0.20
Explanation:
You want to know the cost per square inch of a 10-inch cookie cake that costs $15.70.
Cost per
The cost per square inch is the cost divided by the area in square inches. The area is given by the formula ...
A = πr²
So, the cost per square inch is ...
$15.70/(3.14(5 in)²) = $0.20/in²
The cost per square inch of the cookie cake is $0.20, choice B.
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Additional comment
The radius of the cake is half the diameter, so is 5 inches.
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