1.   If and , find the approximate value of log2 15.
    A. 0.7369 B. 1.4649
    C. 3.9069 D. 3.6802
    Hint
  2.   Solve log4 3 + log4 x = log4 18.
    A. 15 B. 6
    C. 12 D. 54
    Hint
  3.   Solve log3 (x + 4) - log3 (x - 2) = 2 log3 2.
    A. 8 B. 4
    C. 9 D. 6
    Hint
  4.   Solve log5 ( x + 2) + log5 ( 2x - 1) = 2.
    A. 3 B.
    C. no solution D. , 3
    Hint
  5.   Chemistry The pH of a solution and the concentration [H+] of hydrogen ions in the solution are related by the formula . Find the concentration of hydrogen ions in a solution with a pH of 2.9.
    A. 0.00068 B. 0.0013
    C. 794.33 D. 0.00032
    Hint