A state trooper issues 4 tickets on 45% of his days, 2 tickets on 35% of his days, 1 ticket on 15% of his days, and no tickets on 5% of his days. What is the mathematically expected number of tickets
issued per day?

The path traveled by a bottlenose dolphin as it jumps out of water is modeled by the equation y=-0.4+3x, where t is the height above water and x is the horizontal distance in feet. if a beam of light is shone upward at an angle modeled by the equation x+y=10, at what height from the waters surface will the beam of light hit the dolphin