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

Answer 1

To find the difference in distance between Neptune and Mars, we 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 these values, we must express them in the same power of 10. We can do this by writing 4.3514×109 km as 4.3514×108×10 km.

Now we can subtract the values:

(4.3514×108×10 km) - (2.25×108 km) = 4.3514×109 km - 2.25×108 km

Since these values have the same power of 10, we subtract the coefficients:

= 4.3514×108 - 2.25×108 km

= 2.1014×108 km

The difference in distance between Neptune and Mars is 2.1014×108 km.