4. A ball that is hit or thrown horizontally with a velocity of v metres per second will travel a distance d metres before hitting the ground, where d = v 14.9 and h is the height, in metres, from which the ball is hit or thrown. a) Use the properties of radicals to rewrite the formula with a rational denominator. (2 marks) b) How far will a ball that is hit with a velocity of 45 m/s at a height of 0.8 m above the ground travel before hitting the ground, to the nearest tenth of a metre? (2 marks)