Use a graphing calculator to sketch the graph of the quadratic equation, and then determine the x-intervals over which the graph is increasing and decreasing.y = -2x2 - 3x + 4
A. Increasing: (x > -0.75), Decreasing: (x < -0.75)
B. Increasing: (x > 0.75), Decreasing: (x < 0.75)
C. Increasing: (x < -0.75), Decreasing: (x > -0.75)
D. Increasing: (x < 1.5), Decreasing: (x > 1.5)
Answer: C
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Suppose you have the following project digraph. (The numbers in parentheses represent hours.)
Using the critical-path algorithm to schedule this project with six processors results in a finishing time of
A. 19 hours. B. 22 hours. C. 23 hours. D. 18 hours. E. none of these
Simplify the expression. Assume that all variables are positive and write your answer in radical notation.
? 
A. 
B. 
C. 
D. 
Solve and, when appropriate, round the answer to the nearest tenth.The length L that a spring is stretched from its natural length using W amount of work (in foot-pounds) is given by L = 
, where k is a given constant for the spring. If a certain spring has a constant value k of 47.4 and the spring is to be stretched 1.6 feet from its natural length, how much work will be necessary?
A. 30 foot-pounds B. 37.9 foot-pounds C. 60.7 foot-pounds D. 121.3 foot-pounds
Solve the equation.3(x2 - 28) = 27x
A. {4, -3} B. {4, -7} C. {-4, 7} D. {3, -7}