Use the quadratic formula to solve the equation. Simplify any radicals.15n2 = -21n
A. {0}
B. 
C. 
D. 
Answer: B
Mathematics
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Solve the problem.A farmer has 260 meters of fencing and wants to enclose a rectangular area of 4200 square meters. What dimensions should he use?
A. 70 meters by 60 meters
B. 140 meters by 2 meters
C. 65 meters by 65 meters
D. 
meters by 
meters
Mathematics
Find the double integral over the rectangular region R with the given boundaries.
R0 ? x ? 4, -1 ? y ? 1
A. 
B. 
C. 
D. 22
Mathematics
Solve the problem.The cylindrical storage vat in the picture has a base with radius of r and a height of r. The volume of the vat is the product of its height and the area of the base. Find the volume of the cylinder. 
A. 2?r3 m3
B. 
?r3 m3
C. 
?r3 m3
D. ?r3 m3
Mathematics
Simplify.5b - 7b
A. -12b B. -2b2 C. -2b D. 2b
Mathematics