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.
Cost breakdown. According to RSMeans, the cost calculator software an asphalt 1 driveway project must include: Land clearing and tree removal - it is quite common for an area about to be paved to require the removal of brush, trees, and boulders this will tend to cost: $48 per hour, per worker to manage a single acre of cutting and chipping light trees;