Solve the problem.An experimental model for a suspension bridge is built in the shape of a parabolic arch. In one section, cable runs from the top of one tower down to the roadway, just touching it there, and up again to the top of a second tower. The towers stand 50 inches apart. At a point between the towers and 12.5 inches along the road from the base of one tower, the cable is 1.56 inches above the roadway. Find the height of the towers.
A. 5.75 in.
B. 8.25 in.
C. 6.25 in.
D. 6.75 in.
Answer: C
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Sketch the graph and show all local extrema and inflection points.y = x
4
A. Local maximum: 
Local minimum: (10, 0)
Inflection points: 
, (10, 0)
B. Local maximum: 
Local minimum: (10, 0)
Inflection points: 
C. Local minimum: (10, 0)
No inflection points
D. Local maximum: 
Local minimum: (10, 0)
Inflection point: 
Solve the problem.A football player kicks two consecutive field goals from approximately the same distance. Each field goal is worth three points and has probability of success p = 
. Let X denote the number of points scored. Find the expected value of X.
A. 3.0 points B. 3.6 points C. 2.88 points D. 2.97 points E. 2.4 points
Simplify the expression.|-39| + (-13)
A. 26 B. -52 C. -26 D. 52
Evaluate the expression for the given value of the variable.If C is degrees Celsius, the algebraic expression 1.8c + 32 represents the equivalent temperature in degrees Fahrenheit. Evaluate the expression when C = 40.
A. 40.2° F B. 40° F C. 4.6° F D. 104° F