when a dolphin jumps on water surface its pathway follows the relation y=-0.2x^+2x where y is the height of the dolphin above water and x is the horizontal distance in feet. Find the horizontal distance that the dolphin covers when it humps from water

What's for breakfast? all people who ate at a certain restaurant were surveyed as to what they ordered on a particular sunday morning. 40 ate eggs 42 ate sausage 32 ate pancakes 13 ate sausage and eggs 15 ate pancakes and sausage 11 ate eggs and pancakes 6 ate all three items 3 people didn't eat any of the items how many people ate only pancakes? how many people ate at the resturant that morning? how many people didn't eat eggs?