Solve.Elaine has a grassy patch of land on her farm that is a rectangle measuring 50 feet by 90 feet. So her goat can eat grass while Elaine is busy with other farm work, she drove two posts into the ground and fastened a rope to each post, passing the rope through a metal ring on the goat's collar. When the goat pulls on the rope while walking, its path is an ellipse. (See the figure.) If the goat can just reach all four sides of the rectangular patch, find the equation of the elliptical path.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: B
Mathematics
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Solve the problem.A cylindrical water tank has height 10 m and radius 2 m (see figure). If the tank is full of water, how much work is required to pump the water to the level of the top of the tank and out of the tank? Express the answer in terms of ?. 
A. 19,600,000? J B. 627,200? J C. 1,960,000? J D. 490,000 J
Mathematics
Solve the equation symbolically.21x - 2 = 13
A. 
B. 
C. - 
D. 
Mathematics
Graph the ellipse and locate the foci.9x2 + 4y2 = 36
A. foci at (2
, 0) and (-2
, 0)
B. foci at (0, 
) and (0, -
)
C. foci at (
, 0) and (-
, 0)
D. foci at (
, 0) and (-
, 0)
Mathematics
Determine whether the equation defines y as a function of x.xy = -1
A. Yes B. No
Mathematics