Question

The diameter of Mars is about 6.8 x 10^3 km. The diameter of Earth is about 1.2763 x 10^4 km. About how much greater is Earth's diameter than Mars?

Answer 1

12,763 km - 6,800 km = 5,963 km or 5.963×10^3

Answer 2

Answer:
`5.963*10^3` km

Explanation:

Given : The diameter of Mars is about
`6.8* 10^3\ km`.

It can be rewrite as
`6.8*1000=6,800\ km`

[∵
`10^3=10*10*10`]

The diameter of Earth is about
`1.2763 * 10^4\ km.`

It can be rewrite as
`1.2763*10000=12,763\ km`

[∵
`10^4=10*10*10*10`]

Clearly, 12,763> 6,800

Now, the difference in the diameter of Earth and Mars will be :-

`12763-6800=5963\ km`

Which can written as
`5.963* 1000=5.963*10^3`

Hence, Earth's diameter is
`5.963*10^3` km greater than Mars.