Pedro, a rising baseball star, throws a baseball from the outfield toward home plate. The flight of the baseball can be modeled by the quadratic equation y =−10t2 + 10t + 7, where "t" is time (in seconds), and "y" is height above ground (in feet). How high off the ground is the baseball when it leaves Pedro's hand? A-9.5 ft
B-10 ft
C-1.475 ft
D-7 ft