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) = x2 + 2 from x = 1 to x = 4; n = 6

A. 26.875
B. 28.875
C. 30.875
D. 24.875


Answer: C

Mathematics

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A.
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A. -16 B. 2 C. 0 D. -2

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Multiply.(a - b)(a2 - ab - 9b2)

A. a3 - 2a2b - 10ab2  - 9b3 B. a3 - 2a2b - 9ab2 + 9b3 C. a3 - 8a2b + 9b3 D. a3 - 2a2b - 8ab2 + 9b3

Mathematics

The annual net sales (revenue) earned by the Finnish cell phone company Nokia from January 1999 to January 2004 can be approximated by  billion euros per year  where t is time in years

( represents January 2000). Suppose that, from January 1999 on, Nokia invested its revenue in an investment yielding 7% compounded continuously. What, to the nearest €10 billion, would the total value of Nokia's revenues have been at the end of 2003? ? A. Total revenue ? 150 billion euros B. Total revenue ? 180 billion euros C. Total revenue ? 160 billion euros D. Total revenue ? 170 billion euros E. Total revenue ? 190 billion euros

Mathematics