Find the second derivative.r = 
- 
A. - 
+ 
B. 
- 
C. 
+ 
D. 
- 
Answer: B
Mathematics
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Solve the problem.The purchasing power of A dollars after t years of r% inflation is given by the model P = Ae-rt. Assume the inflation rate is currently 6.6%. How long will it take for the purchasing power of $1.00 to be worth $0.67? Round the answer to the nearest hundredth.
A. 0.61 years B. 0.06 year C. 6.07 years D. 10.15 years
Mathematics
Find the perimeter or area of the figure as indicated. Express your answer in simplified radical form.Find the perimeter of the trapezoid. 
A. (17
+ 3
) in.
B. 22
in.
C. 896 in.
D. 23
in.
Mathematics
Write the improper fraction as a mixed or whole number.
A. 188
B. 188
C. 
D. 37
Mathematics
Solve the rational equation.
= 
+ 3
A. ? B. {3} C. {x|x ? 3} D. {0}
Mathematics