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Given that x is a normal variable with mean μ = 49 and standard deviation σ = 7.1, find the following probabilities. P(x ≤ 60)? 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 ? Whats the van't hoff factor of cacl2? If you use multiple Lithium Ion battery packs in series do the amps stack or just the volts? Why does the (h,k) in 2x^2 + 4x end up being (-1,-2) when the vertex form ends up being 2 (x+1)^2 -2? Why isn't it (1, -2)?