Solve the problem.Arches in the shapes of parabolas are often used in construction. Find the equation of a parabolic arc that is 18 feet high at its highest point and 26 feet wide at the base, as illustrated in the figure. Place the origin at the midpoint of the base.
A. y = -x2 + 26
B. y = 
x2 + 18
C. y = -x2 + 18
D. y = - 
x2 + 18
Answer: D
Mathematics
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