Very nice handwriting but the math and English are confusing.
Let's assume we're told

The subscript is important.
I think we're told the similar sum with 11 gives the smallest possible value for the sum. This is a rather cagey way of telling us 11 is the mean of the nine points. The mean is the number which minimizes the sum of squared deviations.


If 11 is the mean, the sum of the points is 9(11)=99.

Answer: 1080
can someone try to help me
1 light-year = roughly 5,874,601,700,000 miles. (rounded)
To work it out, take the speed of light, and change units a few times:
(186,282.397 miles/second)
times
(86,400 second/day)
times
(365 day/year)
= (186,282.397 x 86,400 x 365) mile/year .
You can whip that out on your calculator in no time.
Sure thank you for asking
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