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.y = 2x2 + x + 3 from x = -2 to x = 1; n = 3
A. 25
B. 17
C. 21
D. 13
Answer: D
Mathematics
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Represent the data graphically.The radius of a cone of fixed volume is related to the height according to the following table:
A. 
B. 
C. 
D. 
Mathematics
Solve the absolute value equation.|9x - 8| = 0
A. 
B. ?
C. 
D. 
Mathematics
For the given functions f and g, find the requested function and state its domain. Write the domain in interval notation.f(x) = x - 2; g(x) = 4x2;
Find f - g.
A. (f - g)(x) = 4x2 + x - 2; (-?, ?) B. (f - g)(x) = -4x2 + x - 2; (-?, ?) C. (f - g)(x) = -4x2 + x - 2; (-?, 2) ? (2, ?) D. (f - g)(x) = 4x2 - x + 2; (-?, ?)
Mathematics
Simplify the rational expression. If the expression is already in simplest form, state this as your answer.
A. x + 7
B. 
C. 
D. x - 7
Mathematics