How many plants spaced every 6 in. are needed to surround a circular walkway with a 25-ft radius?

Which choice represents the sample space ,s for this event

Can someone me i’m confused. will give brainliest and a whole bunch of points

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