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Percent of oxygen in iron(II) oxide.? What values of a would give a function f(x) = ax + 2 cosx where there aren't any local mins or maxs? How to find the frequency of the fundamental of a 1.5 meter long string that weighs 3.3 grams that has a tension of 86N? If 5.17 moles of an ideal gas has a pressure of 4.01 atm, and a volume of 22.29 L, what is the temperature of the sample? What is the range of this function Please explain?