Solve the problem.A bridge is built in the shape of a parabolic arch. The bridge arch has a span of 170 feet and a maximum height of 30 feet. Find the height of the arch at 15 feet from its center.
A. 3.7 ft
B. 21.3 ft
C. 29.1 ft
D. 0.2 ft
Answer: C
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Solve the problem.If a person puts one penny in a piggy bank on the first day, two pennies in on the second day, three pennies in on the third day, and so forth, how much money will be in the bank after 60 days?
A. $36.60 B. $18.30 C. $9.15 D. $0.60
Decide whether the relation is a function.Tallest Roller Coaters in U.S. Amusement Parks
A. function B. not a function
Solve the problem.Bob wants to fence in a rectangular garden in his yard. He has 62 feet of fencing to work with and wants to use it all. If the garden is to be x feet wide, express the area of the garden as a function of x.
A. A = 33x2 - x B. A = 30x - x2 C. A = 31x - x2 D. A = 32x - x2
Use Bayes' rule to find the indicated probability.Two shipments of components were received by a factory and stored in two separate bins. Shipment I has 2% of its contents defective, while shipment II has 5% of its contents defective. If it is equally likely an employee will go to either bin and select a component randomly, what is the probability that a defective component came from shipment II?
A. 0.714 B. 0.222 C. 0.5 D. 0.2