Williams Commuter Air Service realizes a monthly revenue of 
dollars when the price charged per passenger is x dollars.
?
Find the marginal revenue 
.
?
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find all specified roots.Fourth roots of -16
A. 2 + i, 2 - i, -2 + i, -2 - i
B. 
+ 
i, 
- 
i, - 
+ 
i, - 
- 
i
C. 8
+ 8
i, 8
- 8
i, -8
+ 8
i, -8
- 8
i
D. 1 + i, 1 - i, -1 + i, -1 - i
Mathematics
Answer the question as instructed.Evaluate 18.
A. 81
B. 
C. 8
D. 1
Mathematics
Solve.If $14,000 is invested at 10% simple annual interest, how much should be invested at 12% annual simple interest so that the total yearly income from both investments is $5000?
A. $3320 B. $33,200 C. $30,000 D. $3000
Mathematics
Solve. Graph the solution on a number line, and express it in interval notation.-8x - 5 > -9x - 8
A. x ? -13, [-13, ?)
B. x < -3, (-?, -3)
C. x > -3, (-3, ?)
D. x ? -13, (-?, -13]
Mathematics