Solve the problem.If the average cost per unit C(x) to produce x units of plywood is given by 
what is the unit cost for 40 units?
A. $22.50
B. $0.75
C. -$7.50
D. $12.86
Answer: D
Mathematics
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Evaluate the integral using the given substitution.
, u = cot 3?
A. 
csc3 3? cot2 3? + C
B. 
cot2 ? + C
C. - 
cot2 3? + C
D. - 
tan2 3? + C
Mathematics
Solve the problem.Find the perimeter of a rectangular room 14.3 ft long by 8.4 ft wide.
A. 37 ft B. 45.4 m C. 45.4 ft D. 22.7 ft
Mathematics
Divide.4 ÷ (-8)
A. 5 B. -5 C. -0.5 D. -1.5
Mathematics
Verify the identity.
= 
What will be an ideal response?
Mathematics