Question 7 (1 point) What are the maximum and minimum values for y - 28(1.21)" on the interval 0 S x $ 12? 275.8 and 0 275.8 and 28 O 249.7 and 28 188.4 and 28 Question 8 (1 point) Which of the following solutions is 1000 times more acidic than baking soda, which has a pH of 9? Soapy water, with a pH of 12. Pure water, with a PH of 7. Saliva, with a PH of 6. Lemon juice, with a PH of 2. Question 9 (1 point) If f = {(-7, 1), (-5, 8), (3, 11), (5, -1)] and g = {(-6, 4), (-5, 3), (-1, 7), (5, 5)), what is f + Off-13, 5), (-10, 11), (2, 18), (10, 4)} O {(-10, 11), (10, 4)} O {(-5, 8), (-5, 3), (5, - 1), (5, 5)} O {(-5, 11), (5, 4)}