Ascuba diver descended at a rate of 2 1/4 feet per second. if 0 represents the surface of the walter and distance is below the surface are negative, which expression represents one way to calculate the location of the river after 12 1/2 seconds? a) 12 1/2 - 2 1/4 b) 12 1/2 + 2 1/2 c) 12 1/2 x 2 1/2 d 12 1/2 x (-2 1/4)