What is the base edge of a pentangonal prism?

In specific the base edge for this one:

Ineed solving this problem h/8=-25 solve for h idk how to this can someone show me and also give an answer you

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!

The graph shown is the graph of which function?