I need helping finding out the dilation ​

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

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.