On August 27, 2003, Mars reached a distance of 55,758,000 km from the earth, which was the closest distance between the two planets in nearly 60,000 years. Which of the following values would you use to write
this distance in scientific notation to two significant figures?
O 56.0 x 10^6km
O 5.6 x 10^8 km
O 5.6 x 10^7 km
O 5.5 x 10^7 km
O 5.57 x 10^8 km
O5.57 x 10^7 km