How many ways can you plant 15 flowers from a group of 36 flowers?

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Which of the following is the result of expanding the series

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