Factor. Assume that variables in exponents represent natural numbers.2x3a - 128y3b
A. 2(xa - 4yb)(xa + 4xayb + 16yb)
B. 2(xa + 4yb)(x2a - 4xayb + 16y2b)
C. 2(xa - 4yb)(x2a + 4xayb + 16y2b)
D. 2(x - 4y)(x2a + 4xy + 16y2b)
Answer: C
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Solve the equation.- 
s = - 
A. 
B. 
C. 
D. 
?For which whole number values of r does the volume of a sphere have a numerically larger value than the surface area of a sphere?
A. ?r> 2 B. ?r> 3 C. ?r> 0 D. ?|r| > 1 E. ?The volume of a sphere always has a numerically larger value than the surface area of a sphere.
Find the magnitude and direction angle (to the nearest tenth) for each vector. Give the measure of the direction angle as an angle in [0,360°].
A. 100; 270° B. 10; 180° C. 10; 270° D. 10; 90°
Write the phrase as a variable expression. Use x to represent "a number."The product of 6 and a number
A. 
B. 6 + x
C. 6x
D. 6 - x