1. If a / b = - 3 / 4, then b3 / a3 is equal to   16 / 9   27 / 64   - 64 / 27   - 27 / 64   64 / 27   Hint Half-n-half Clue   2. A large water reservoir has two outlet pipes, a small one and a large one. It takes 7  hours to empty the reservoir when only the small outlet pipe is open. It takes 5  hours to empty the reservoir when only the large outlet pipe is open. About what fraction of the reservoir will be emptied in one hour if both the pipes are open?   0.34   0.20   0.14   0.06   cannot be determined   Half-n-half Clue   3. If x is negative and (x - 2)2 = 49, then x2 is equal to   51   9   25   81   -5   Half-n-half Clue   4. Pineapples cost 30  cents each, whereas pears cost 60  cents a dozen. A litre of fruit punch requires 1/3  of a pineapple and 4  pears. How many dollars will it cost to make 8  litres of fruit punch?   20.00   0.30   None of these   2.00   2.40   Half-n-half Clue