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i just need someone to check my answer.

Jocelyn needs to study two stars for her astronomy research. She has narrowed her choices down to four stars that are located on a straight line from earth. Jocelyn wants to study the two stars that are closest to each other. Which two stars should she study?

and here i solved them vvvv

Star A | 0.176 10^18 km 176000000000000000

Star B | 22.13
10^16 km 221300000000000000

Star C | 314210^14 km 3142000000000000

Star D | 125.5*10^15 km 125500000000000000

I chose A and D.

It then also asks

"What is the distance between the two stars? Explain your strategy"

and i put "I solved the answers and once I got the numbers closest to each other i subtracted them to get 50500000000000000"


If i'm wrong can you correct my mistakes?