Use similar triangles to solve. a person who is 5 feet tall is standing 99 feet from the base of a tree, and the tree casts a 110 foot shadow. the person's shadow is 11 feet in length. what is the height of the tree?

Ben frank is an electrician who installs lighting fixtures. he charges (in dollars) his clients 15h+40f15h+40f where hh is the number of hours worked and ff is the number of fixtures installed. how much does ben frank charge when he works 77 hours and installs 99 fixtures?