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Can Mucus be produced voluntary by some animals. Or wax voluntary in their ears anytime they want in any quantity.? I went in for a procedure, a same day surgery. Dr found a tumor and im scheduled for surgery tomorrow. Does this mean its serious? A(4,0) B(0,-3) Find plot on graph? If a and b are roots of equation x^2 +x -12 =0 such that a>b then equation whose roots are 2a and 3b is ?Please!? Calculate stress and strain in round bar 12mm in diameter and 150mm long with tensile force of 400N acting on it?