Question

Which is the exact area of a circle with radius fourteen centimeters?

fourteen centimeters squared

fourteen times pi centimeters squared

twenty-eight times pi centimeters squared

one hundred ninety-six times pi centimeters squared
help

Answer 1

Use the formula

Answer 2

is it 196?

Answer 3

\(A = \pi r^2 \)

r = radius

Just substitute in the formula and evaluate. Keep \(\pi\) as it is.

Answer 4

\(A = 196\pi~cm^2 \)

Answer 5

Which is the cost per square inch of a pizza with diameter 20 inches if the cost of the pizza is $16? Be sure to round your answer to the nearest cent.

about 1 cent

about 5 cents

about twenty-five cents

about eighty cents

Answer 6

im confused ^

Answer 7

@taliyahparker It is the answer that has 196 in it, but remember that the answer is
\( 196\pi ~cm^2 \), not just simply 196.

Answer 8

I got that @mathstudent55

Answer 9

The area of a circle is calculated by multiplying the square of the radius by pi.
Ok?

Answer 10

ok

Answer 11

Here, the radius is 14 cm. The square of 14 cm = (14 cm)^2 = 196 cm^2.
Then you multiply that by \(\pi\), so you get \(196\pi ~cm^2\).
Do you understand now?

Answer 12

yes but I was talking about that other problem when I said I was confused

Answer 13

Oh, sorry, I had not noticed the second problem. I'll look at it now.

Answer 14

You need to do 2 things.
1. First, find the area of the pizza in square inches.
2. Then convert the price of the pizza to cents and divide by the area of the pizza.

Answer 15

Remember, the area of a circle is

\(A = \pi r^2 \)

Here we are given that the diameter of the pizza is 20 in.
What is the radius of the pizza if the diameter is 20 in.?