Identify and graph the polar equation.r = 6 - cos ?
A. limacon with no inner loop and no dimple
B. limacon with no inner loop and no dimple
C. limacon with inner loop
D. limacon with inner loop
Answer: B
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Solve the problem.A railroad tunnel is shaped like a semiellipse. The height of the tunnel at the center is 25 ft and the vertical clearance must be 
at a point 
from the center. Find an equation for the ellipse. 
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Determine whether the statement is true or false.In the simplex method, a basic variable is a variable which has a coefficient of 1 and which occurs in only one equation.
A. True B. False
Solve the problem.Sketch a graph showing the mileage that a person is from home after x hours if that individual drives at 27.5 mph to a lake 55 miles away, stays at the lake 1.5 hours, and then returns home at a speed of 55 mph.
A. 
B. 
C. 
Find the square.
2
A. 2x2 + 1xy + 
y2
B. 4x2 + 
xy+ 
y2
C. 4x2 + 
y2
D. 4x2 + 1xy + 
y2