Solve the quadratic inequality by sketching the graph of the corresponding quadratic function.x2 - 4 ? 0
A. Solution: (-?, -2) ? (2, ?)
B. Solution: (-?, -2) ? (2, ?)
C. Solution: (-?, -2] ? [2, ?)
D. Solution: [-2, 2]
Answer: C
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Find the slope of a straight line that passes through the given pair of points.(-7, -6) and (-5, -9)
A. - 4
B. - 
C. - 
D. - 
Solve the problem.The population of a particular city is increasing at a rate proportional to its size. It follows the function 
where k is a constant and t is the time in years. If the current population is 22,000, in how many years is the population expected to be 55,000? Round to the nearest year.
A. 6 yr B. 76 yr C. 11 yr D. 5 yr
Write the number as an exponential expression, using the base shown. Check your result with a calculator.32 (base 2)
A. 25 B. 35 C. 52 D. 26
Solve the equation.6 = 
a
A. {14} B. {13} C. {48} D. {0}