Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Solve the problem.Find the center of mass of the first-octant portion of a solid ball of radius 4 centered at the origin.
A. (
, 
, 
) = 
B. (
, 
, 
) = 
C. (
, 
, 
) = 
D. (
, 
, 
) = 
Mathematics
Write a positive or negative fraction to describe the situation.Rickey gained 
pound during summer vacation.
A. - 
B. 
C. - 
D. 
Mathematics
Solve the equation.(3x + 4)(x + 9) = 53x + 29
A. - 
, - 
, -9
B. - 
, -9
C. 
, 7
D. - 
, - 
Mathematics
The management of Acrosonic plans to market the ElectroStat, an electrostatic speaker system. The marketing department has determined that the demand for these speakers is 
, where p denotes the speaker's unit price (in dollars) and x denotes the quantity demanded.
?
Find the marginal revenue function 
.
?
A. 
B. 
C. 
D. 
Mathematics