Graph the ellipse and locate the foci.
+ 
= 1
A. foci at (
, 0) and (-
, 0)
B. foci at (0, 
) and (0, -
)
C. foci at (2
, 0) and (-2
, 0)
D. foci at (
, 0) and (-
, 0)
Answer: B
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Use a calculator to evaluate.1,8932
A. 1,895 B. 7,572 C. 3,786 D. 3,583,449
Round the number as requested.26.8901 (nearest thousandth)
A. 26.891 B. 26.890 C. 26.88 D. 26.9
Graph the function over a one-period interval.y = - 
cos
+ 2
A. 
B. 
C. 
D. 
Solve the problem.A boy is flying a model airplane while standing on a straight line. The plane, at the end of a twenty-five foot wire, flies in circles around the boy. The directed distance of the plane from the straight line is found to be d = 25 cos 
where d is measured in feet and t is the time in seconds. If d > 0, the plane is in front of the boy; if d < 0, the plane is behind him. What is the amplitude? What is the period? Graph d over two periods beginning at t = 0. 
What will be an ideal response?