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. 25
D. 13
Answer: D
Mathematics
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Factor as completely as possible. If unfactorable, indicate that the polynomial is prime.12x2 + 4x - 16
A. (x - 4)(12x + 4) B. (4x + 4)(3x - 4) C. (3x - 4)(4x + 4) D. (4x - 4)(3x + 4)
Mathematics
Determine the vertex of the parabola.f(x) = 10x2 - 40x + 44
A. (2, 4) B. (2, 0) C. (0, 4) D. (4, 2)
Mathematics
Find the unit price and decide which is the better buy.Popcorn:27 ounces for $1.6714 ounces for $1.01
A. $0.072 per oz; 14-oz size B. $0.062 per oz; 14-oz size C. $0.062 per oz; 27-oz size D. Both cost the same per ounce.
Mathematics
Using a calculator, evaluate the expression. Round the answer to four decimal places.cot(-arcsin ?)
A. -0.0009 B. -1094.771 C. 0 D. undefined
Mathematics