∠1 and ∠2 are vertical angles. ∠1 measures 48°. what is the measure of ∠2?

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.

The volume of the a sphere whoes diameter is 18 cm is cubic cm . if it's diameter were reduced by half, it's volume would be of its original volume

What is the value of the product (3-2i)(3+2i)?