
solve for "a", to get the coefficient, and then plug it back in the equation.
true because the square root is a number times itself and 4*4 is 16
Let's say the original radius was "r", so the circumference is 2πr and the area is πr².
Now when you double the radius, the you get a new circle with radius 2r, circumference 2π(2r) = 4πr, and area π(2r)² = 4πr².
I would but I can’t see the picture I don’t know why... what is the question please type it ,thank you