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How can i shere my picture or video? Will someone show me how to find what F(3) + G(4) - 2H(5)= if F(x) = 3x^2 + 1, G(x) = 2x - 3, H(x) = x ? Given that x is a normal variable with mean μ = 49 and standard deviation σ = 7.1, find the following probabilities. P(x ≤ 60)? How was the cov( X(s), X(t)) obtained. i know that E[x(s)] * E[x(t)] = 0 but i don't know how to calculate E[x(s) x(t)]? Look up the formula for acetic acid. Which of acetic acids 4 hydrogen’s is the acidic one. Why are the other three not ionizable?