i have 31.6 = 12.74(Z - 18.63)^1.15 and i need to find Z i get 20.01 can any1 confirm this?

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Originally Posted by question i have 31.6 = 12.74(Z - 18.63)^1.15 and i need to find Z i get 20.01 can any1 confirm this? Let us see. 31.6 = (12.74)(z -18.63)^(1.15) 31.6 / 12.74 = (z -18.63)^(1.15) 2.480377 = (z -18.63)^(1.15) Raise both sides to their 1/(1.15) power, 2.203225 = z -18.63 2.20 +18.63 = z z = 20.83 ---------------answer. Uh-oh, that's not 20.01. It is close, though.

Originally Posted by question i have 31.6 = 12.74(Z - 18.63)^1.15 and i need to find Z i get 20.01 can any1 confirm this? divide through by : Now take logs: rearrange and simplify: so: so: RonL