Question

this line means to divide! you need to calculate the au for each of the planets. earth is already done and the example below shows how to work out the au for mars. earth in km: 149, mars in km: 228, planet distance: 149, planet distance in au: = planet distance / 149, mars in au: 228 / 149 = 1.53 au

Explanation:

Step1: Recall the conversion method

To convert the distance of a planet from kilometers to astronomical - units (AU), we divide the distance of the planet in kilometers by the distance of Earth from the Sun in kilometers (149 million km is approximately 1 AU).

Step2: Perform the division for Mars

Given Mars distance in km is 228 million km. We divide 228 by 149. The calculation is $\frac{228}{149}\approx1.53$.

Answer:

1.53 AU