Lett be the number of years since farming began in a region. The number, N, of acres of harvested land at time t is given by N = f(t) = 68 √/t. Find f(4), f' (4), and the relative rate of change f att 4. Interpret your answers in terms of harvested land. f(4) = ƒ' (4) = ƒ' (4) ƒ (4) = i i i (Round your answer to three decimal places.)

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