Solve.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 12 ft and the vertical clearance must be 8 ft at a point 15 ft from the center. Find an equation for the ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: B
Mathematics
You might also like to view...
Simplify the rational expression. (Assume the denominator is nonzero.)
A. 
B. - 
C. 
D. 
Mathematics
Evaluate the expression.-5-3
A. 
B. -125
C. 125
D. - 
Mathematics
?Find the x- and y-intercepts of the graph of the equation 
.
?
A. ?x-intercept: 
y-intercept: 
B. ?
x-intercept: 
y-intercept: 
C. ?x-intercept:
y-intercept: 
D. ?x-intercept:
y-intercept: 
E. ??x-intercept:
y-intercept: 
Mathematics
Graph the function by first finding the relative extrema.f(x) = 
A. 
B. 
C. 
D. 
Mathematics