Solve the problem.The total profit from selling x units of cookbooks is 
Find the marginal average profit function.
A. 56x - 88
B. 56x - 32
C. 56 - 
D. 56 - 
Answer: C
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Solve the problem.If tan-1 x is replaced by 
and |x| < 0.6, what estimate can be made of the error?
A. |E| < 0.0039991 B. |E| < 0.0046656 C. |E| < 0.0066651 D. |E| < 0.0077760
Use the partial sum formula to find the partial sum of the given arithmetic sequence.Find 2 + 4 + 6 + 8 + . . ., the sum of the first 35 positive even integers.
A. 1260 B. 1220 C. 1224 D. 1264
Find the phase shift.y = 4 sin
A. 
units to the left
B. 
units to the left
C. ? units to the right
D. 
units to the right
Solve each system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.x - y + 2z + w = 2y + z = 2z - w = 3
A. {(-5 - 4w, -1 - w, 3 + w, w)} B. {(-5, -1, 3, w)} C. ? D. {(-9, -2, 4, 1)}