The distance of planet Mercury from the Sun is approximately 5.8 ⋅ 107 kilometers, and the distance of Earth from the Sun is 1.5 ⋅ 108 kilometers. About how many more kilometers is the distance of Earth from the Sun than the distance of Mercury from the Sun? 4.3 ⋅ 107 kilometers 9.2 ⋅ 107 kilometers 9.2 ⋅ 108 kilometers 5.7 ⋅ 109 kilometers

(1) Answers

You have to move the decimal symbol one place to right in the second distance, this is because you need to have both number with notation x10^7: so, 1.5x10^8= 15x10^7 Now you can substract (15-5.8)x10^7 because they have the same notation: (15-5.8)x10^7= 9.2x10^7 kilometers So the answer is b

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