An article in International Journal of Electrical Power & Energy Systems ("Stochastic Optimal Load Flow Using. Combined Quasi-Newton and Conjugate Gradient Technique" (1989, Vol. 11(2), pp. 85-93)) considered the problem of optimal power flow in electric power systems and included the effects of uncertain variables in the problem formulation. The method treats the system power demand as a normal random variable with 0 mean and unit variance. What is the power demand value that is exceeded with 80% probability? Round your answe to two decimal places (e.g. 98.76). Answer is Blank 1

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