Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Solve.2x3 + 36 ? 5x2 + 21x
A. [-3, 4]
B. (-?, -3] ? 
C. [-3, ?)
D. 
? [4, ?)
Mathematics
Graph the polar equation.r sin ? = -1
A. 
B. 
C. 
D. 
Mathematics
A force of 30 N is required to maintain a spring stretched from its natural length of 12 cm to a length of 15 cm. How much work is done in stretching the spring from 12 cm to 26 cm?
a. 10.80J b. 14.00J c. 12.00J d. 9.80J e. 13.00J
Mathematics
Solve the equation. 
= 4
A. - 
, 
B. No Solution
C. 
, - 
D. 
, - 
Mathematics