Which is the graph of the function f(x) = 1/2x^2 + 2x – 6?

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

Twelve less than a number is at most 20

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)