1 The roots of a quadratic equation are real, rational, and equal when the  discriminant is

(1) 2        (3) 0
(2) 2          (4) 4

1         2         3         4        

2 Chad had a garden that was in the shape of a rectangle. Its length was twice its width. He decided to make a new garden that was 2 feet longer and 2 feet wider than his first garden. If x represents the original width of the garden, which expression represents the difference between the area of his new garden and the  area of the original garden?

(1) 6x + 4         (3) x2 + 3x + 2
(2) 2x2              (4) 8

1         2         3         4        

3 The accompanying graph represents the value of a bond over time.

 

Which type of function does this graph best model?

(1) trigonometric        (3) quadratic
(2) logarithmic            (4) exponential

1         2         3         4        

4 An object that weighs 2 pounds is suspended in a liquid. When the object is  depressed 3 feet from its equilibrium point, it will oscillate according to the  formula x = 3 cos (8t), where t is the number of seconds after the object is  released. How many seconds are in the period of oscillation?

(1) π/4       (3) 3
(2) π          (4) 2π

1         2         3         4        

1         2         3         4