Solve the problem.A nuclear cooling tower cross section is a hyperbola having a diameter of 60 ft at the center. The distance between the two foci is 90 ft. What is the equation for the hyperbola?
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 5
D. 
- 
= 1
Answer: D
Mathematics
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For the given functions f and g, find the requested composite function value.f(x) = 4x + 6, g(x) = 2x2 + 1;
Find (f ? f)(4).
A. 2179 B. 969 C. 94 D. 138
Mathematics
Find the focus and directrix of the parabola with the given equation.y2 = 24x
A. focus: (6, 0) directrix: x = -6 B. focus: (6, 0) directrix: x = 6 C. focus: (0, -6) directrix: y = -6 D. focus: (0, 6) directrix: y = -6
Mathematics
Evaluate using a table of integration formulas.
A. 
- 
+ C
B. 
+ 
+ C
C. xe2x - 
+ C
D. 
- 
+ C
Mathematics
Find a parametric representation for the part of the elliptic paraboloid x² + y² + 8z² = 9 that lies in front of the plane x = 0. Select the correct answer.
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Mathematics