Find a quadratic model for the sequence with the indicated terms.
?
a0 = -3, a2 = 2, a4 = 10
?
A. an= 
n2 - 
n - 3
B. an = 3n2 + 
n + 
C. an = 
n2 + 
n + 3
D. an = 
n2 + 
n - 3
E. an= -3n2+ 
n + 
Answer: D
Mathematics
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Find the volume of the described solid.The base of a solid is the region between the curve y = 3cos x and the x-axis from x = 0 to 
. The cross sections perpendicular to the x-axis are squares with bases running from the x-axis to the curve.
A. 
?
B. 
?
C. 2?
D. 
?
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Evaluate the integral.
dt
A. 20
B. 4 ln 5
C. 
- 
D. 5
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Find different polar coordinates (r, ?) for the same point under the given conditions.
, r < 0 and 2? < ? < 4?
A. 
B. 
C. 
D. 
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Find an algebraic expression that represents the area of the shaded region. 
9x + 10
A. 72x2 - 10x - 100 B. 72x2 - 10x + 100 C. 72x2 - 90x - 100 D. 72x2 + 170x - 100
Mathematics