Use the shell method to find the volume of the solid generated by revolving the shaded region about the indicated line.About the line y = -1
A. 
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B. 
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C. 
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D. 
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Answer: C
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Write the rational expression in simplest form.
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A. ?
B. ?
C. ?
D. ?
E. ?
Solve the problem.Use the formula N = Iekt, where N is the number of items in terms of the initial population I, at time t, and k is the growth constant equal to the percent of growth per unit of time. A certain radioactive isotope decays at a rate of 0.2% annually. Determine the half-life of this isotope, to the nearest year.
A. 347 years B. 3 years C. 250 years D. 151 years
For the given geometric sequence, find an and the sum of the terms from a1 to an. 2, 10, 50, 250 ... ; find a9
A. 390,627; 45 B. 781,250; 18 C. 250; 976,562 D. 781,250; 976,562
For the given pair of functions, find the requested function.f(x) = 5x - 2, g(x) = -9x2 - 10x + 7; (f + g)(x)
A. -9x2 - 5x + 5 B. 9x2 - 4x - 9 C. -9x2 + 5x + 5 D. -10x2 - 5x - 5