Which vectors are unit vectors?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

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