An increase in either of these physiological components (cardiac output or TPR) causes a rise in the mean arterial pressure. Vasodilation works to decrease TPR and blood pressure through relaxation of smooth muscle cells in the tunica media layer of large arteries and smaller arterioles.
Contractors' prices for 2-4 hours with heavy equipment removing a small area of concrete (such as a 8x10-foot patio 4-8 inches thick) start around $250-$550 and go up. Removing an average driveway is $1,000-$2,500 and up, particularly if it's reinforced concrete. Prices vary considerably by region.
Measure the square footage of your driveway by multiplying its length by its width. For example, the square footage of a 40 ft. long x 20 ft. wide driveway is 800 square feet. In this example, a typical demolition cost would range from $800 to $2,400.