31. Automotive Trades The formula P + 2T = C gives the overall diameter C of the crankshaft gear for a known pitch diam- eter P of the small gear and the height T of teeth above the pitch diameter circle. If P = 2.875 in. and C = 3.125 in., find T. 32. Water/Wastewater Treatment The pressure P (in pounds per square inch or psi) on a submerged body in wastewater is given by P = 0.520D + 14.7 where D is the depth in feet. At what depth is the pressure 25.0 psi