III. Find the domain of each function in interval notation. 1. f(x) = Slog (x + 3) 2. g(x) = log; (5x - 7) 3. h(x) = 1n (x2+ 6x27) IV. Word Problems 1. The pH of a chemical solution is given by pH = log [H+ ], where [If ] is the conogntration of hydrogen ions in the solution, in units of moles per liter. (One mole is 6.02 x 1023 molecules). Round your answers to the nearest tenth. a. Find the pH of a solution for which [H+ ] = 0.00000839. b. Find the pH of a solution for which [If ] = 0.000000000278