Solve the problem.An experimental model for a suspension bridge is built. 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 are both 12.25 inches tall and stand 70 inches apart. Find the vertical distance from the roadway to the cable at a point on the road 17.5 inches from the lowest point of the cable.
A. 3.26 in.
B. 2.86 in.
C. 12.25 in.
D. 3.06 in.
Answer: D
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Solve the problem.A balloon used in surgical procedures is cylindrical in shape. As it expands outward, assume that the length remains a constant 
Find the rate of change of surface area with respect to radius when the radius is 
(Answer can be left in terms of ?).
A. 50.24? mm2/mm B. 50.12? mm2/mm C. 100.0? mm2/mm D. 100.24? mm2/mm
Solve the equation.
+ 4 = 
- 2
A. 
B. 
C. 
D. 
Use the graph of f to solve the inequality.f(x) > 0
A. (-3, 0) ? (1, 2) B. (-3, 0) ? (1, ?) C. (-?, -3) ? (0, 1) D. (1, 2)
Solve the problem.Three trains - one eastbound, one westbound, and one northbound - leave a city at the same time. The speed of the northbound train is 30 miles per hour greater than the speed of the eastbound train. After 5 hours, the distance between the westbound train and the eastbound train is 450 miles. Twice the speed of the westbound train is 60 miles per hour more than the speed of the northbound train. Find the speeds of the three trains.
A. eastbound, 40 mph; westbound, 60 mph; northbound, 70 mph B. eastbound, 60 mph; westbound, 60 mph; northbound, 30 mph C. eastbound, 20 mph; westbound, 70 mph; northbound, 60 mph D. eastbound, 30 mph; westbound, 60 mph; northbound, 60 mph