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
According to our concrete slab material estimator, the average minimum cost per square foot of a concrete slab is $1.36 and the maximum is $1.88.By comparison, the price per square foot for a cement slab is $5.50.Just know that even if you do not hire a pro, there are additional costs that come with all concrete slab projects. Supplies, such as the wood used to shape the concrete, can add $3.75 per square foot.n the likelihood that you do hire a pro, installation costs for a concrete slab average $65.50 per hour. If you have a poor foundation or are working on a slope, the overall cost can go up.