Solve.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 26 ft and the vertical clearance must be 13 ft at a point 21 ft from the center. Find an equation for the ellipse.
A. +
= 1
B. +
= 1
C. +
= 1
D. +
= 1
Answer: B
Mathematics
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.
A. ?
B. 320?
C. 160?
D. ?
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For what values of x does the series converge conditionally?
A. x = 3 B. x = 3, x = 5 C. x = 5 D. None
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Based on the side measures given, decide whether the triangle is equilateral, isosceles, or scalene.
A. Equilateral B. Scalene C. Isosceles
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Write the solution set to the inequality in interval notation.x ? 3
A. (-?, 3] B. (3, ?) C. (-?, 3) D. [3, ?)
Mathematics