How much will it cost to paint a circular sign with a radius of 4 feet if the painter charges $1.50 per square foot?

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Answer 1 · 2015-11-14T01:06:28

$75.40

First, we must find the area. The formula for the area of a circle is $A=pir^2$ , and we know from the question that $r=4$ .

Therefore, $A=pi(4^2)=color(blue)(16pi)$ square feet.

Since the painter charges $$1.50$ per square foot, he would charge a total of $16pi*1.50=color(red)($75.40)$ .

Answer 2 · 2015-11-14T01:14:22

$75.39

The area of a circle is given by the formula $pir^2$ . Plugging the radius into the equation, we get:
$pi times 4^2=16pi, or 50.26ft^2$

If the sign costs $1.50 per square foot, then the cost for the sign is:
$50.26 times $1.50 =$75.39$