Question

A circular railroad sign has a diameter of 20 inches. what is the area of the sign in square inches

Answer 1

100
`\pi` (or about 314)

Explanation:

So it's a circle, meaning that the formula for area is
`\pi r^(2)`. r= diameter divided by 2, so r=10. plug into equation and you get 100
`\pi`.

314 is when you round pi to 3.14 and multiply by 100.