Which ones do I choose?

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8