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.(1 point)

Answer 1

To find out how much farther Neptune is from Earth than Mars, we can subtract the distance from Mars from the distance to Neptune:

Distance from Earth to Neptune - Distance from Earth to Mars

= 4.3514 × 10^9 km - 2.25 × 10^8 km

To subtract these values, we need to make sure they have the same exponent. Since 10^8 is smaller than 10^9, we can multiply 2.25 by 10 to make it 22.5:

= 4.3514 × 10^9 km - 22.5 × 10^8 km

Now, we can subtract the distances:

= 4.3514 × 10^9 km - 22.5 × 10^8 km

= 4.3514 × 10^9 km - 0.225 × 10^9 km

= (4.3514 - 0.225) × 10^9 km

= 4.1264 × 10^9 km

Therefore, Neptune is 4.1264 × 10^9 km farther from Earth than Mars.