At their closest recorded distance apart, which was 34.8 million miles, it would take 182 seconds (just over three minutes). At their maximum possible distance apart, which is 250 million miles, it would take approximately 22 minutes for the signal to reach Mars.
video on the cost of concrete floors depending on the level of complexity concrete floors can cost as little as $ 2 to $ 6 a square foot or be as expensive as $ 15 to $ 30 a square foot
Basic cost for a polished concrete floor up to a 800 grit: $3.00 per square foot. Cost for polished concrete floors requiring decorative scoring and/or staining: Up to $8.00 per square foot. For large commercial floors, may include staining and decorative scoring: From $3.00 - $7.00 per square foot.