Solve the problem.The formula 
can be used to approximate the number, C, (in millions) of laptops sold over a ten-year period, where x is the number of years since the first year this information was recorded. According to this formula, how many laptops were sold in year 10? Round the answer to the nearest tenth of a million.
A. 17 million
B. 15.2 million
C. 11.9 million
D. 4.6 million
Answer: A
Mathematics
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Answer the question appropriately.Find the area of the "triangular" region in the first quadrant that is bounded above by the curve 
, below by the curve y = ex, and on the right by the line x = ln 4.
A. 
B. 4 ln 4
C. 
D. 210
Mathematics
Add. Simplify, if possible.
+ 5
A. 6
B. 6
C. 5
D. 6
Mathematics
Use the quadratic formula to solve the equation. Simplify any radicals. 81k2 + 18k + 1 = 0
A. 
B. {0, 9}
C. 
D. {± 9}
Mathematics
Graph.4x2 + 64y2 = 256
A. 
B. 
C. 
D. 
Mathematics