How much is a Concrete slab per foot?

9x8x1'=72cubft72/27=2.66cuyds2.66*1.5 (1cubyrd weighs approx 300lbs) = 3.99 tons

Depends on size and thickness. You take length x Width x Thickness= Then Divide by 27. That will give you How many yards of concrete you need. Then you need to call your local concrete company and...

As stated, the question is meaningless. Area and length are not comparable.

typically roofing contractors charge between $2.50 up to $5.00 per square ft. Here is a pretty good online roofing calculator. This depends heavily on the type of roof you install. Metal, Shingle...

one bag of thinset can cost about 13 dollars for versabond wich I recommend as a tile setter for 15 years. One bag can 60-80 square with a quarter inch trowel and less with bigger trowels. 3 eighths...