What is the volume of the right prism?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Ineed i been stuck on this question since yesterday

Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol