Solve the problem.The average number of vehicles waiting in line at a toll booth of a super highway is modeled by the function 
, where x is a quantity between 0 and 1 known as the traffic intensity. To the nearest tenth, find the average number of vehicles waiting if the traffic intensity is 0.81.
A. 3.5 vehicles
B. 8.5 vehicles
C. 6.9 vehicles
D. 1.6 vehicles
Answer: C
Mathematics
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Solve the problem.Place the numbers 8, 9 10, 11, and 12 in the circles to make the sum across equal to the sum vertically. 
Which numbers can be placed in the center circle?
A. 8, 10, and 12 B. 10, 11, and 12 C. 8, 9, and 10 D. 9, 10, and 11
Mathematics
Solve the quadratic inequality by graphing an appropriate quadratic function.x2 + 3x + 2 ? 0
A. (-?, -2] ? [-1, ?) B. (-?, -2] C. [-2, -1] D. [-1, ?)
Mathematics
Find an equation for the ellipse described.Center at (0, 0); focus at (-3, 0); vertex at (6, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Graph the system of inequalities. Shade the region that represents the points of intersection.
A. 
B. 
C. 
D. 
Mathematics