The function f(x) = -x2 - 7x + 30 shows the relationship between the vertical distance of a diver from poll's surface f(x), in feet, and the horizontal distance x, in feet, of a diver from the diver board. what is a zero of f(x) , and what does it represent? a.) x = 10; the diver hits the water 10 feet away horizontally from the boredb.) x =3; the diver hits water 3 feet away horizontally from the boredc.) x=10.; the diver jumps in the pool 10 second peer second d.) x=3; the diver jumps in at 3 feet per second