At the Circus, the the clown is fired into the air from a cannon. The equation that represents his height at any time is h = 8t - 5tº where h is the eight of the clown and t is time in seconds. When will he back at the level of the cannon?

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?