SOLUTION: Suppose that an engineer determines that she can use the formula -r^2+14≤P to estimate when the price of carbon fibre will be P dollars per kilogram or less in T years from t
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Question 1060936: Suppose that an engineer determines that she can use the formula -r^2+14≤P to estimate when the price of carbon fibre will be P dollars per kilogram or less in T years from the present. When will carbon fibre be available at $10k/g or less? Answer by ikleyn(52776) (Show Source):
