Me to answer these 1- there are 40 ping-pong balls in a box. 16 of them are dented. find the ratio of the number is dented ping-pong balls to the total number of ping-pong balls in the box if another 12 dented ping-pong balls are added into the box? ? = 2- the total height of three friends, sasha, tess and wendy, is 470 cm. the ratio of the height of sasha to the height of tess is 3 : 4. wendy is 30 cm taller than tess. find the ratio of tess’ height to wendy’s height? ? = 3- josh, ben and rick have 70 marbles altogether. the ratio of the number is marbles josh has to the number of marbles rick has is 1 : 2. however, ben has 15 marbles fewer than rick. how many marbles does ben have? =