could someone please help me get started with this problem. I am lost
our galaxy has a diameter of about 100,000 light years. and a thickness of about 2000 light years. our sun is locate about 28000 light years from center of our galaxy, and orbits once every 200 million years. calculate the speed of the sun relative to the center of galaxy in km/s. use C=2 r to determine the orbital distance, and pi=3.14.

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Google says
"1 lightyear =9.4605284 × 10^12 kilometers"
and 1 year is "3.15569e7 seconds"

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