Ummm I forgot how to do this
So do (21/2+49/4)-3/2=You get 21 1/4 miles
Since 21 1/4 is close to 21 1/2, this answer is reasonable. So A is the answer
The center of a circle, because of the constant radius, or the center of a square because all the diagonals are equal. If that's what you're asking?
The answer is the square root of (12^2 + 5^2), which is 13. You're correct
