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
To find the difference in distance between Earth and Neptune and Earth and Mars, we subtract the distance to Mars from the distance to Neptune:
4.3514×10^9 km - 2.25×10^8 km.
To subtract these numbers, we need to ensure that they have the same base. We can convert 2.25×10^8 km to scientific notation by representing it as 2.25×10^8 km + 0×10^8 km.
So, now the two numbers have the same base:
4.3514×10^9 km - 2.25×10^8 km = 4.3514×10^9 km + 0×10^8 km - 2.25×10^8 km.
Now, we can simply subtract the coefficients:
4.3514 - 2.25 = 2.1014.
Therefore, Neptune is 2.1014×10^9 km farther from Earth than Mars.