Question

Which of the following masses is/are equivalent to seventy billion metric tons?

1) 7.0x10^10 metric tons
2) 0.070 trillion metric tons 3) 70,000 million metric tons
4) all of them are equal to seventy billion metric tons

Answer 1

The correct answer is 70,000 million metric ton.
Seventy billion metric ton = 70, 000,000,000 = 70 * 10^9
70,000 million metric ton = 70,000 * 10^6 = 70 * 10^9
Thus, seventy billion metric ton is equivalent to 70,000 million metric ton.