First you multiply the two equations, equaling 3000000 kg and 60000 kg respectively. Once you have those numbers, you divide the Oakland mass by the Mapleville mass, so 3000000/60000. The answer is 50, to the tree is B, 50 times as big.
100 times, because 5 times 100 equals 500
153 000 = 100 000 + 50 000 + 3 000
The answer is c to my calculations.
