PLEASEEE HELP! I DONT KNOW HOW TO SO THIS $h:7 hello pls

The value √10 and √15 are plotted on the number line

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

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