Factor completely.9x3 + 18x2 + 8x
A. x(3x - 4)(3x - 2)
B. (9x2 + 4)(x + 2)
C. x(3x + 4)(3x + 2)
D. x(9x + 1)(x + 8)
Answer: C
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Set up a definite integral that gives the arc length of the given curve.x = sin 2t, y = cos t, 0 ? t ? 
A. 
B. 
C. 
D. 
Solve the problem.A balloon (in the shape of a sphere) is being inflated. The radius is increasing at a rate of 5 cm per second. Find a function, r(t), for the radius in terms of t. Find a function, V(r), for the volume of the balloon in terms of r. Find (V ? r)(t).
A. (V ? r)(t) = 
B. (V ? r)(t) = 
C. (V ? r)(t) = 
D. (V ? r)(t) = 
Solve.Determine the area of a circular enclosure and a square enclosure made with 778 feet of fence. Use 
A. Circular: 32,835 ft2; square: 37,830 ft2 B. Circular: 48,167 ft2; square: 151,321 ft2 C. Circular: 32,835 ft2; square: 151,321 ft2 D. Circular: 48,167 ft2; square: 37,830 ft2
Factor when possible.128x4 - 250x
A. (8x2 - 10)(16x2 + 25) B. 2x(64x - 5)(x2 + 20x + 25) C. 2x(4x + 5)(16x2 - 20x + 25) D. 2x(4x - 5)(16x2 + 20x + 25)