Solve the polynomial inequality. Express the solution in interval notation.2x2 - 3x ? 5
A. (-?, -1) ? 
B. 
C. (-?, -1] ?
D. 
Answer: C
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The floor of a lake slopes downward in a straight line. The depth 27 feet from shore is 16 feet. At what distance from shore is the depth 40 feet? ?
A. 67.50 feet B. 24.52 feet C. 23.70 feet D. 67.67 feet
Solve the problem.The polynomial 0.0033x3 + 0.0058x2 + 0.112x + 1.75 gives the approximate total earnings of a company, in millions of dollars, where x = 0 corresponds to 2008, x = 1 corresponds to 2009, and so on. This model is valid for the years from 2008 to 2012. Determine the earnings for 2009. Round to the nearest hundredth.
A. $1.75 million B. $1.87 million C. $2.02 million D. $1.86 million
Each matrix is nonsingular. Find the inverse of the matrix. Be sure to check your answer.
A. 
B. 
C. 
D. 
Solve the problem.Given that the polar equation r = 
models the orbits of the planets, estimate the smallest possible distance between Earth, for which 
and 
and Venus, for which 
and 
A. About 0.4 astronomical units B. About 0.2 astronomical units C. Zero astronomical units D. About 2 astronomical units