Solve the problem.A bridge is built in the shape of a parabolic arch. The bridge arch has a span of 154 feet and a maximum height of 30 feet. Find the height of the arch at 20 feet from its center.
A. 28 ft
B. 0.5 ft
C. 34.2 ft
D. 8.1 ft
Answer: A
Mathematics
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A. 36 yd B. 35 yd C. 52.5 yd D. 29 yd
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× 
A. 
B. 
C. 
D. 
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÷ 
A. x + 9
B. 
C. 
D. 
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Find the exact value of the logarithmic expression.log81
A. 8
B. 1
C. 
D. 0
Mathematics