Solve the problem.An arch for a bridge over a highway is in the form of a semiellipse. The top of the arch is 35 feet above ground (the major axis). What should the span of the bridge be (the length of its minor axis) if the height 30 feet from the center is to be 13 feet above ground?
A. 50.48 ft
B. 32.31 ft
C. 161.54 ft
D. 64.62 ft
Answer: D
Mathematics
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When is the body's acceleration equal to zero?
A. 0 < t < 2, 6 < t < 7 B. 2 < t < 3, 5 < t < 6 C. t = 2, t = 3, t = 5, t = 6 D. t = 0, t = 4, t = 7
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Evaluate the integral by changing the order of integration in an appropriate way.
A. 
B. 
C. 
D. 
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Simplify the expression.sin4x - cos4x + cos2x
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Mathematics