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
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Find the divergence of the field F.F = 
A. 
B. 0
C. 
D. 
Simplify.-90 - 70
A. -16 B. 2 C. 0 D. -2
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
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