Solve.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 54 ft and the vertical clearance must be 18 ft at a point 8 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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Evaluate the integral.
A. 
B. 
C. 
D. 
Mathematics
Consider the two fictional city wards in the table below. They have experienced the largest population gain of all the wards in the city, so one of them will receive an additional seat on the city council. Find the absolute unfairness of the apportionment if the Southwest ward gets the council seat. Round all intermediate calculations and the answer to the nearest whole number.
a. 70
b. 77
c. 76
d. 75
Mathematics
Determine if the type of relation is linear, nonlinear, or none.
A. none B. nonlinear C. linear
Mathematics
Simplify: 
A. 
B. 
C. 
D. 
Mathematics