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
for commercial concrete floors the cost is anywhere from $ 50 $ 1 00 dollar per sq ft more if you re trying to figure what the cost for concrete flooring is in your area i would suggest calling a local redi mix concrete company and asking them for 3 referrals