Factor by grouping.20a3 - 24a2b - 25ab2 + 30b3
A. (4a2 - 5b)(5a - 6b)
B. (4a2 + 5b2)(5a + 6b)
C. (20a2 - 5b2)(a - 6b)
D. (4a2 - 5b2)(5a - 6b)
Answer: D
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Find the center of mass of the thin rod with the given density function.Find the center of mass of a thin rod that lies along the first-quadrant portion of the circle
if the density of the rod is 
A. 
= 
?, 
= 
?
B. 
= 
?, 
= 
?
C. 
= 0, 
= 
?
D. 
= 2?, 
= 2?
Find the lateral surface area and volume of the solid object. (Round to the nearest whole number and use the ? key for ?.)
A. L = 244 in.2, V = 317 in.3 B. L = 239 in.2, V = 317 in.3 C. L = 244 in.2, V = 311 in.3 D. L = 478 in.2, V = 1242 in.3
What will be an ideal response?
Simplify the algebraic expression by combining like terms.-6(2x - 9) - 4x + 7
A. -16x - 47 B. 8x + 61 C. -16x + 61 D. 16x + 61