Multiply.(5x2 - 3x + 3)(x2 - 5x - 3)
A. 5x4 - 28x3 + 3x2 - 6x - 9
B. 5x4 - 25x3 + 3x2 - 6x - 9
C. 5x4 - 28x3 + 0x2 - 6x - 9
D. 5x4 - 25x3 + 0x2 - 6x - 9
Answer: A
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Find the volume of the indicated region.the region bounded by the paraboloid 
and the xy-plane
A. 20?
B. 80?
C. 
?
D. 200?
Find the work done by F over the curve in the direction of increasing t.F = -4zi + 2xj + 10yk; C: r(t) = ti + tj + tk, 0 ? t ? 1
A. W = 
B. W = 4
C. W = 8
D. W = 16
Solve.A certain radioactive isotope has a half-life of approximately 1450 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 40% of that amount?
A. 1877 years B. 1069 years C. 870 years D. 1917 years
Answer each question appropriately.Suppose the area of the region between the graph of a positive continuous function f and the x-axis from x = a to x = b is 7 square units. Find the area between the curves y = f(x) and y = 5f(x).
A. -28 square units B. 35 square units C. 42 square units D. 28 square units