Question

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in kilometers.

1) 6.1 × 105 km
2) 5.3 × 105 km
3) 3.9 × 105 km
4) 1.5 × 105 km
5) 9.4 × 104 km

Answer 1

The average distance between Earth and the Moon in kilometers, after converting from miles, is approximately 3.86 × 10^5 km, which is option 3: 3.9 × 10^5 km.

Step-by-step explanation:

The average distance between the Earth and the Moon is 240,000 miles. To express this distance in kilometers, we use the fact that 1 mile is equal to approximately 1.60934 kilometers. Therefore, to convert miles to kilometers, we multiply the number of miles by this conversion factor.

240,000 miles × 1.60934 km/mile = 386,241.6 km

When expressed in scientific notation, this distance is approximately 3.86 × 105 km, which is option 3: 3.9 × 105 km.