Simplify.
÷ 
A. 
B. 
C. 
D. 
Answer: B
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Provide an appropriate response.Suppose a machine costing $12,000 is to be replaced at the end of 7 years, at which time it will have a salvage value of $6000. In order to provide money at that time for a new machine costing $15,000, a sinking fund is set up into which equal payments are placed at the end of every quarter. If the fund earns 5.6% compounded quarterly, what should each payment be?
Fill in the blank(s) with the appropriate word(s).
Solve the problem.In September 1998 the population of the country of West Goma, in millions was modeled by 
At the same time the population of East Goma, in millions was modeled by
In both formulas x is the year, where 
corresponds to September 1998. Assuming these trends continue, estimate the year when the population of West Goma will equal the population of East Goma.
A. 2013 B. 1982 C. 16 D. 2014
Find the sum. 
+ 
A. 
B. 
C. 
D. 
Solve the problem.The revenue for a small company is given by the quadratic function 
where t is the number of years since 1998 and r(t) is in thousands of dollars. If this trend continues, find the year after 1998 in which the company's revenue will be $2185 thousand. Round to the nearest whole year.
A. 2009 B. 2011 C. 2010 D. 2020