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) = 3x2 - 2 from x = 1 to x = 5; n = 4
A. 144
B. 150
C. 140
D. 154
Answer: D
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Solve the problem.Find a unit vector perpendicular to plane PQR determined by the points P(2, 1, 3), Q(1, 1, 2) and R(2, 2, 1).
A. 
(-i - 2j - k)
B. 
(i - 2j - k)
C. 
(i - 2j + k)
D. 
(i - 2j - 2k)
Solve the problem.A town's annual snowfall is normally distributed with a mean of 44 inches and a standard deviation of 6 inches. In what percentage of years is the snowfall between 32 and 44 inches?
A. 34% B. 95% C. 47.5% D. 68%
Write the number in words.44,033
A. forty-four hundred thousand, thirty-three B. forty-four hundred, thirty-three C. forty-four thousand, three hundred three D. forty-four thousand, thirty-three
Determine the largest open intervals of the domain over which the function is increasing, decreasing, and constant.
A. Increasing (2, ?); Decreasing (-?, -2) B. Increasing never; Decreasing (-?, -2) ? (2, ?) C. Increasing (-?, -2) ? (2, ?); Decreasing never D. Increasing (-2, 2); Decreasing (-?, -2) ? (2, ?)