haha i literally was just learning this!!!
ok, so the formula is A = 4πr2 (the 2 is supposed to be squared) you can use 3.14 for pi.
45 units2 = 4(3.14)r2
you figure out the problem from there to find the radius of the original sphere then find the surface area of twice the sphere.
i hope this helps you get started!! good luck!
