# Math

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A star is 300 light years away from Earth. If the speed of light is 3 X 10^5 km/s, calculate the distance the star is from Earth. Give your answer in kilometers and written if standard form.

• Math -

300(3 x 10^5)
= 900 x10^5
= 9.0 x 10^7

• Math -

300 years
= 300(365) days
= 300(365)(24) hours
= 300(365)(24)(3600) seconds

so distance
= 300(365)(24)(3600)(3 x 10^5) km
= 2.3824 x 10^16 km

• Math -

The question says 300 light years not 300 years

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