What type of relationship does this pair of angles have 67 and 23

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

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

Which is f(5) for the function –2x2 + 2x - 3?