Final answer:
The total load exerted on an 8-foot-tall retaining wall with a soil pressure of 45 PSF is 180 pounds per foot run of the wall, calculated using the formula P = p (h/2).
Step-by-step explanation:
The total load on a retaining wall that is 8 feet tall with a soil pressure of 45 PSF (pounds per square foot) can be calculated using the provided formula P = p (h/2), where 'P' represents the total load (in pounds per foot run of the wall), 'p' is the pressure (in PSF), and 'h' is the height of the wall in feet. To find the total load exerted on the retaining wall, we input the values into the formula:
P = 45 PSF (8 ft / 2) = 45 PSF x 4 ft = 180 pounds per foot run of the wall.
Therefore, the total load exerted on the wall is 180 pounds per foot run of the wall. Since the question does not provide the length of the wall, the total pressure for the entire wall cannot be calculated without this information.