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 80 inches apart. At a point between the towers and 20 inches along the road from the base of one tower, the cable is 4 inches above the roadway. Find the height of the towers.
A. 16 in.
B. 18 in.
C. 16.5 in.
D. 15.5 in.
Answer: A
Mathematics
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Solve the problem.A condominium association is holding an election for president of the board of directors. Each member ranks the candidates. The preference schedule below shows the results of the ballots with candidates Abbott (A), Blake (B), Cleary (C), and Downs (D).
Determine the winner using the Borda count method.
A. Blake B. Abbott C. Downs D. Cleary
Mathematics
Write interval notation for the graph.
A. [-5, -1) B. (-5, -1] C. [1, 5) D. (1, 5]
Mathematics
Graph the inequality.2x + 3y ? 6
A. 
B. 
C. 
D. 
Mathematics
Write as a percent. Round your answer to the nearest tenth, if necessary.
A. 24.7% B. 2.2% C. 22.2% D. 90%
Mathematics