Solve.
= 
A. 16
B. 6
C. 
D. 
Answer: A
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Use logarithmic differentiation to find the derivative of y.y = 
A. 5
B. 
(ln x + ln(x - 3) - ln(x4 + 5))
C. 
D. 
+ 
- 
Find the indicated quantity for an infinite geometric series.a1 = 3, r = 
, S = ?
A. Does not exist
B. 
C. 6
D. 
All references are to the figure below. The distance between A and D is a, and the distance between D and C is x. 
Assuming that A = 29°, ?BDC = 52°, and a = 10, find h and x.
A. x ? 8, h ? 10 B. x ? 20, h ? 10 C. x ? 7.6, h ? 10. D. x ? 18, h ? 10.
A manufacturer of a certain commodity has estimated that her profit in thousands of dollars is given by the expression
?
?
where x (in thousands) is the number of units produced.
?
What production range will enable the manufacturer to realize a profit of at least $6,000 on the commodity?
?
A. Between 1,000 and 9,000 units. B. Between 5,000 and 10,000 units. C. Between 5,000 and 6,000 units. D. Between 1,000 and 6,000 units. E. Between 1,000 and 10,000 units.