The figure shows the cost of mailing a first-class letter, f(x), as a function of its weight, x, in ounces, for a recent year. Use the graph to solve Exercises 111-114. 1.15 0.93 0.71 0.49 1 2 3 4 Weight (ounces) Source: Lynn E. Baring, Postmaster, Inverness, CA 111. Find f(3). What does this mean in terms of the variables in this situation? 112. Find f(3.5). What does this mean in terms of the variables in this situation? 113. What is the cost of mailing a letter that weighs 1.5 ounces? 114. What is the cost of mailing a letter that weighs 1.8 ounces? Cost (dollars)

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