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 
.
Answer: D
Mathematics
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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 .
Answer: D
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Use the table below to write the Hindu-Arabic numeral as a traditional Chinese numeral.
52
A. 
B. 
C. 
D. 
Find the exact or approximate circumference of the circle, as indicated.Find the exact circumference.
A. 32.5? km B. 4225? km C. 65? km D. 130? km
Factor using the formula for the sum or difference of two cubes.27x3 + 64
A. (3x - 4)(9x2 + 12x + 16) B. (3x + 4)(9x2 + 12x + 16) C. (3x + 4)(9x2 + 16) D. (3x + 4)(9x2 - 12x + 16)
Determine the y-intercept.
A. no y-intercept B. (1, 0) C. (0, 0) D. (0, 1)