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Paygrade E4 E5 E4 is the 4th enlisted paygrade in the United States military, with monthly basic pay ranging from $2, for an entrylevel E4 to $2,900 per month for E4 personnel with over 40 years of experience The civilian equivalent of this military grade is roughly GS4 under the federal government's General Schedule payscalePiece of cake Unlock StepbyStep Natural Language Math InputConsider a random variable Y = r(X) for some function r, eg Y = X2 3 so in this case r(x) = x2 3 It turns out (and we have already used) that E(r(X)) = Z 1 1 r(x)f(x)dx This is not obvious since by de nition E(r(X)) = R 1 1 xf Y (x)dx where f Y (x) is the probability density function of Y = r(X) 1 ƒ‚ƒe‚é "¯Œ^ ƒƒ"ƒY 40'ã