Use n = 4 to approximate the value of the integral by the trapezoidal rule.
A. 
B. 
C. 
D. 
Answer: D
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Complete the statement to illustrate the commutative property.4 ? 3 = 3 ? ___
A. 6 B. 5 C. 10 D. 4
Use the Venn diagram to list the set of elements in roster form.Find (A ? B)'.
A. ? B. {7, 2, 4} C. {7} D. {7, 2, 4, z, q, f}
Multiply.(4 - 2i)(9 + 8i)
A. 52 - 14i B. -16i2 + 14i + 36 C. 52 + 14i D. 20 - 50i
Solve the problem.It is estimated that the total value of a stamp collection is given by the formula 
where t is the number of years from now. If the inflation rate is running continuously at 4% per year so that the (discounted) present value of an item that will be worth $v in t years' time is given by 
Sketch the graph of the discounted value as a function of time at which the stamp collection is sold. The graph has an absolute maximum. What is the value of t at the absolute maximum? What is the discounted value of the collection at that time?
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A. 
; at which time the discounted value is 
.
B. 
; at which time the discounted value is 
.
C. 
; at which time the discounted value is
.
D. 
; at which time the discounted value is 
.