Neptune is approximately 4.5 billion kilometers from the sun. What is this distance in AU?
Below are the choices that can be found from other source:
a. 0.3 AU
b. 3.8 AU
c. 30 AU
d. 3 million AU
Answer is c. 30 AU.
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Answer:
Neptune is 30.08 AU from the sun
Explanation:
It is given that, Neptune is approximately 4.5 billion kilometers from the sun. We know that,
1 billion km = 10⁹ km
Astronomical unit is the unit to measure distance from earth to sun. It is equal to :
\(1\ AU=1.496\times 10^8\ km\)
4.5 billion km means, \(4.5\times 10^9\ km=45\times 10^8\ km\)
So, \(45\times 10^8\ km=\dfrac{45\times 10^8}{1.496\times 10^8}=30.08\ AU\)
Hence, 4.5 billion km equals 30.08 AU.