Physics
posted by Kevin .
Suppose that an environmental study determines that a town produces approximately 2,000 lb of trash each day. The study group decides to convert their findings to SI units, using the conversion 1 lb = 0.4536 kg. They report that the town produces 907.2 kg of trash each day. Which of the following is correct?
1)The study group used the wrong conversion factor. They should have reported that the town produces 4,409 kg of trash each day.
2)The study group used the correct conversion, but they should have reported that the town produces 907 kg of trash each day.
3)The study group used the correct conversion factor but did not account for significant digits.
4) None of these statements are correct.
I got the answer to be (3) because isn't the answer supposed to be rounded to the nearest whole number?

answer 3 is the best answer.