Show work 10 dollar paypal to the best answer message me for the paypal after. 11

Can you simplify 4/7? 24 points will be awarded!

This is so hard and it’s for a test

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