Find an equation for the hyperbola described.Vertices at (0, ±10); asymptotes at y = ± 
x
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Answer: A
Mathematics
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Solve.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 60 ft and the vertical clearance must be 30 ft at a point 9 ft from the center. Find an equation for the ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Test the equation for symmetry and sketch its graph.
Mathematics
Draw an example of the acute equilateral triangle. ?
A. 
B. 
C. 
D. 
E. 
Mathematics
Change to the equivalent decimal.
A. 0.375 B. 3.75 C. 0.038 D. 0.267
Mathematics