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How do you find the Fourier cosine and sine transforms of e^(-ax) where a > 0? What's the answers to my math test? Is ther bob? Use enthalpy tables to calculate the change in enthalpy for the following reaction: CO(g) + 3H2 —> CH4(g) + H2(g)? I have 7 times as many quarters as I do nickels. If the total value of the quarters and nickels is $19.80, how many quarters do I have?