An 8 ft3 tank contains air at an initial temperature of 80F and intial pressure of 100psi. The tank develops a small hole, and air leaks from the tank at a constant rate of .03 lb/s for 90s until the pressure of the air remaining in the tank is 30psi. Employing the ideal gas model, determine the final temerature, in F, of the air remaining in the tank.