The rule is that the angle is half the measure of the intercepted arc. So it's 110.
We have 3⁴ = 81, so we can factorize this as a difference of squares twice:

Depending on the precise definition of "completely" in this context, you can go a bit further and factorize
as yet another difference of squares:

And if you're working over the field of complex numbers, you can go even further. For instance,

But I think you'd be fine stopping at the first result,

5 7/8 is the answer to the problem
The most you can make is 16 because you need a dvd in each prize even though there is still pretzels and popcorn
HOPE THIS HELPS!! PLEASE MARK BRAINLIEST