The average distance from Earth to Mars is 2.25×108 km, and the distance from Earth to Neptune is 4.3514×109 km. How much farther is Neptune from Earth than Mars? Express your answer in scientific notation. Do not round your answer.
To find the difference in distance between Neptune and Mars, we need to subtract the distance from Earth to Mars from the distance from Earth to Neptune.
Distance from Earth to Neptune - Distance from Earth to Mars = (4.3514×109 km) - (2.25×108 km)
To subtract the distances in scientific notation, we need to have the same power of 10. Both distances have the power of 10 equal to 9.
(4.3514×10^9 km) - (2.25×10^8 km) = 4.3514×10^9 km - 0.225×10^9 km
Since the powers of 10 are the same, we can simply subtract the coefficients:
4.3514 - 0.225 = 4.1264
The difference in distance between Neptune and Mars is 4.1264 × 10^9 km.