1.   Simplify (7a4b) (8a7b6).
    A. 56a28b6 B. 56a11b7
    C. 15a28b6 D. 15a11b7
    Hint

  2.   Simplify Assume the denominator is not equal to zero.
    A. B.
    C. D.
    Hint

  3.   Find .
    A. 14 B. -14
    C. 15 D. -15
    Hint

  4.   Solve the equation x2 = 0.81.
    A. x = 0.9 or x = -0.9
    B. none of these is correct
    C. x = 0.9 only
    D. x = -0.9 only
    Hint

  5.   Which equation represents exponential growth?
    A. y = 3.96(0.65)x B. y = 2.03(5)x
    C. y = 6.38(1)x D. y = 9(0.5)x
    Hint

  6.   Which expression increases most quickly?
    A. 2x B. x + 2
    C. 2x D. x2
    Hint