Multiply.(-4p4r)(5p2qr5)(-2q5r4)
A. - 40p6q6r10
B. 40p5q7r10
C. - 40p5q7r10
D. 40p6q6r10
Answer: D
Mathematics
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Solve the problem.The profit made when t units are sold, t > 0, is given by 
Determine the number of units to be sold in order for P > 0 (a profit is made).
A. 20 < t < 14 B. t = 34 C. t > 20 or t < 14 D. t = 20 or t = 14
Mathematics
Solve the equation.
= 
- 
A. {14} B. no solution C. {7, 14} D. {7}
Mathematics
Factor the sum or difference of two cubes completely.729y3z - z
A. z(9y + 1)(81y2 - 9y + 1) B. z(9y - 1)(81y2 + 1) C. z(729y - 1)(y2 + 9y + 1) D. z(9y - 1)(81y2 + 9y + 1)
Mathematics
Find an equation for the ellipse described.Center at (0, 0); focus at (-5, 0); vertex at (8, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics