Posted by karen on Wednesday, October 26, 2011 at 10:34pm.
If the distance is 8.0E7 WHAT? miles? km? feet? gallons?
distance = rate x time.
Radio waves travel at 3E8 m/s
Oh I am sorry, the distance between mars and earth is measured in kilometers.
Substitute into distance = rate x time and solve for time. You will need to change the distance from km to m or rate from m/s to km/s.
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