1.   represents the _____.
    A. height of each of n rectangles from a to b B. none of these
    C. width of each of n rectangles from a to b D. width and height of each of n rectangles from a to b
    Hint

  2.   Use limits to evaluate .
    A. 5 B. 8
    C. 6 D. 4
    Hint

  3.   Use limits to find the area of the shaded region in the graph.
   
    A. units2 B. 26 units2
    C. 27 units2 D. 20 units2
    Hint

  4.   Use limits to evaluate .
    A. 3 B. 2
    C. D. 2x
    Hint

  5.   When ,
xi represents ___________.
    A. the x-coordinate of the left edge of the current rectangle in the summation
    B. the x-coordinate of the right edge of the current rectangle in the summation
    C. the width of the current rectangle in the summation
    D. the height of the current rectangle in the summation
    Hint