Solve the problem.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 28 ft and the vertical clearance must be 24 ft at a point 13 ft from the center. Find an equation for the ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: C
Mathematics
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Solve the problem.In the weighted voting system 
,
A. P1 is a dictator. B. P1 has veto power but is not a dictator. C. every player is a dictator. D. there are no dictators E. none of these
Mathematics
Find the average value of the function f over the region R.f(x, y) = ex2R is the region bounded by 
, 
, 
, and 
.
A. e - 1
B. 
C. 2e - 1
D. 
Mathematics
Use a graphing calculator to find the zeros of the function. Round to three decimal places.f(x) = x2 - 2x - 9
A. -5.717, 3.717 B. -3.717, 5.717 C. -2.162, 4.162 D. -4.162, 2.162
Mathematics
Determine whether the number is divisible by 2, 3, 4, 5, 6, 7, 8, 9, and/or 10.30,020
A. 4, 5, 10 B. 2, 4, 5, 10 C. 4, 5 D. 2, 5
Mathematics