14. 15. When an object is dropped from rest it falls about 5 min the rst second, 15 In in the second, second, 25 min the third second, and so on. If a rock is dropped from a hot air balloon and takes 16 seconds to hit the ground, how high above the ground is the balloon? 2 marks Determine the sum of all the multiples of 4 between 1 and 999. 15) 124 500 2 marks