To solve the problem we must know about Scientific notations.
The way through which a very small or a very large number can be written in shorthand. In scientific notations when a number between 1 and 10s is multiplied by a power of 10.
For example, 6,500,000,000,000 can be written as 6.5 x 10^12.
Saturn is (7.94 x 10^8) miles far from the sun than the Earth.
Given to us
If we travel from the sun towards Saturn then we will find earth in between therefore, the earth lies in between these two.
Distance between Saturn and the earth
= Distance between Saturn and the sun - Distance between the earth and the sun
= (8.87 x 10^8) - (9.3 x 10^7)
= (88.7 x 10^7) - (9.3 x 10^7)
= (88.7 - 9.3) x 10^7
= 79.4 x 10^7
= 7.94 x 10^8
Hence, Saturn is (7.94 x 10^8) miles far from the sun than the Earth.
Learn more about Scientific notations:
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