A star is 8. 1xx10^(13) km away fr...

A star is `8. 1xx10^(13)` km away from the earth. Suppose light travels at the speed of `3. 0xx10^5` km per second. How long will it take the light from the star to reach the earth? `7. 5xx10^3hou r s` b. `7. 5xx10^4\ hou r s` c. `2. 7xx10^(10)\ s e con d s` d. `2. 7xx10^(11)s e con d s`

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