Write the sum in summation notation.
+ 
+ 
+ 
+ . . .
A. 
B. 
C. 
D. 
Answer: D
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Identify the conic that the polar equation represents. Also, give the position of the directrix.r = 
A. ellipse, directrix parallel to the polar axis 1 below the pole B. ellipse, directrix perpendicular to the polar axis 1 left of the pole C. ellipse, directrix parallel to the polar axis 1 above the pole D. ellipse, directrix perpendicular to the polar axis 1 right of the pole
Solve the problem.Ignoring friction, the time , t (in seconds), required for a block to slide down an inclined plane is given by the formula 
where b is the length of the base in feet and 
per second is the acceleration of gravity. How long does it take a block to slide down an inclined plane with a base of 12 feet at an angle of 
Round your answer to three decimal places.
A. 0.354 sec B. 6.962 sec C. 0.868 sec D. 1.227 sec
Solve the system.xy - x2 = -20x - 2y = 3
A. 
B. 
C. 
D. 
Find the y-intercept of the line determined by the equation.
?
?
A. 
B. ?
C. ?
D. ?
E. ?