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 are both 16 inches tall and stand 80 inches apart. At some point along the road from the lowest point of the cable, the cable is 2.56 inches above the roadway. Find the distance between that point and the base of the nearest tower.
A. 24.2 in.
B. 24 in.
C. 15.8 in.
D. 16.2 in.
Answer: B
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Find the intersection.x = -2 + 8t, y = 8 - 5t, z = 9 + 8t ; 3x + 8y - 7z = 2
A. (6, 3, 17)
B. (-10, 13, 1)
C. 
D. 
Solve the problem.After using a new order of typewriter ribbons, John's Office Services found that a new ribbon could be used to type 92 pages. This was a decrease of 9.5% of pages from the old ribbons. How many pages could John's Office Services type with an old ribbon? Round to the nearest whole number.
A. 102 pages B. 97 pages C. 112 pages D. 92 pages
Solve the equation by factoring.x2 = -4x
A. {0, 4} B. {-4} C. {0, -4} D. {4}
Write and solve an equation to find the percent increase or decrease. Round your answer to the nearest tenth of a percent, if necessary.By switching service providers, a family's telephone bill decreased from about $50 a month to about $42. What was the percent of decrease?
A. 17%
B. 19%
C. 16%
D.
| 8% |