Please help me with this I don't really know how to do it...

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.