solving applications

Algebra
Tutor: None Selected Time limit: 1 Day

It takes 2*10^7 years for a particular start to make one orbit around its galaxy.Assume that this star's orbit in its galaxy is circular with a diameter of 10^4 light years. There are 5.859*10^12 miles in 1 light year. Estimate how many miles this star travels in one year. 

Scientific notation, round to one decimal place if needed.

Oct 3rd, 2015

Thank you for the opportunity to help you with your question!


D=Total distance travelled by star in 2*10^7 years is 10^4(light years)*5.859*10^12(miles/light year)=5.859*10^16 miles

Total distance travelled by the star in one year=D/2*10^7

=5.859*10^16/2*10^7=2.9295*10^9 miles


Please let me know if you need any clarification. I'm always happy to answer your questions.
Sep 20th, 2015

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Oct 3rd, 2015
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