Approximate the area under the curve and above the x-axis using n rectangles. Let the height of each rectangle be given by the value of the function at the right side of the rectangle.f(x) = 2x2 + x + 3 from x = -2 to x = 1; n = 3
A. 17
B. 21
C. 13
D. 25
Answer: C
Mathematics
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Find parametric equations for the line described below.The line through the point P(-4, 2, 0) and perpendicular to the plane 
A. x = -4t - 4, y = 7t + 2, z = 7t B. x = -7t - 4, y = -7t - 4, z = 0 C. x = 4t + 4, y = -7t - 2, z = -7t D. x = -4t + 4, y = 7t - 2, z = 7t
Mathematics
Write as an improper fraction.6
A. 
B. 
C. 
D. 
Mathematics
Find the derivative of the function.
?
?
A. 
B. 
C. 
D. 
Mathematics
Find the vertices of the ellipse.
+ 
= 1
A. (-8, 2), (4, 2)
B. (- 2
, 2), (2
, 2)
C. (6, 2), (-6, 2)
D. (-2 + 2
, 2), (-2 - 2
, 2)
Mathematics