The distance between neptune and the sun is 30.06 au. what is this distance in millions of kilometers?

There are several important information's already given in the question. Based on those information's the answer can be easily deduced. The most important thing that one needs to know is the conversion value between au and kilometers.

1 au = 1.496e+8 kilometers
Then
30.06 au = 4.49691e+9 kilometers.

I hope the conversion is absolutely clear to you and the answer has also come to your desired help.

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