Find the least common multiple of 4n and 7n^2

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

What expression is equivalent to (84+16)

What is the answer to question 11? will give extra points! include a explanation (reasonable) for you : )