How long would it take an instruction to a Martian rover to travel to Mars from NASA site on Earth when Earth and Mara are 68.4 million km apart?
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A: A) distance of astronaut on the moon (d) = 3.8×108 m

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- Can you please help me with this question? Thank you!An Unidentified Flying Object (UFO) moving along a line with constant speed was sighted at (8, 9, 10) at noon and at (13, 19, 20) at 1:00 pm. Where was the UFO at 12:20 pm? When, and from where, did it leave the ground (z = 0)? What was the UFO’s speed?The distance to a star is approximately 4.43 ✕ 1018 m. If this star were to burn out today, in how many years would we see it disappear? (b) How long does it take sunlight to reach Earth? in minutes(c) How long does it take for a microwave radar signal to travel from Earth to the Moon and back? (The distance from Earth to the Moon is 3.84 ✕ 105 km.)in seconds
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