The concentration of creatinine is a better indicator of renal. function than urea or uric acid because it is not affected by diet, exercise, or hormones. The creatinine level has been used in combination with BUN to differentiate between. prerenal and renal causes of an elevated urea/BUN.
Roof surfaces are measured in squares.. A square is an area of roof which measures 100 square feet. To determine the number of squares on the gable roof above, simply divide its total of 24,000 square feet by 100. The result is 240, and this means you would need 240 squares of shingles to cover that roof.
The cost to reshingle a roof depends on the size of the roof and materials used. The cost of reshingling a roof depends on many factors, but the two biggest factors are the type of shingle you select and the area of the roof measured in squares. A square refers to an area of 100 square feet. All roofing materials are priced and sold by the square. The design of the roof also plays a role in estimating cost because some designs add to waste, so always add 10 to 15 percent to the estimated squares needed.