The Kuiper Belt is estimated to be about 3,000,000

Question

meters wide. Which value represents the estimated width of the Kuiper Belt, in meters, in scientific notation?
Responses

3.0×10−6
meter
3 point 0 times 10 to the negative 6 power meter

30×10−5
meter
30 times 10 to the negative 5 power meter

30×105
meters
30 times 10 to the 5th power meters

3.0×106
meters

Answer 1

3.0×10^6 meters