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Simba Travel Agency arranges trips for climbing Mount Kilimanjaro. For each trip, they charge an initial fee of \$100$100 in addition to a constant fee for each vertical meter climbed. For instance, the price for climbing to the Shira Volcanic Cone, which is 30003000 meters above the base of the mountain, is \$400$400. Let F(d)F(d) denote the fee of a trip FF (measured in dollars) as a function of the vertical distance climbed dd (measured in meters). Write the function's formula. F(d)=