Solve the equation.
= ?x - 1?
A. {2}
B. ?
C. {- 2, - 
}
D. {2, 
}
Answer: D
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Solve the problem.The radius of a newly discovered planet is approximately 56,000,000 meters. Rewrite the radius in scientific notation.
A. 5.6 × 108 m B. 5.6 × 106 m C. 56 × 106 m D. 5.6 × 107 m
Complete.15,840 yd = 
mi
A. 15
B. 9
C. 3
D. 47,520
The graph of a one-to-one function f is given. Sketch the graph of the inverse function f-1, on the same set of axes. Use a dashed line for the inverse.
A. 
B. 
C. 
D. 
Solve the problem.Assume that college graduates and noncollege graduates have children in the same numbers. Suppose also that 70% of the children of college graduates also graduate from college. Of the children of noncollege graduates, 20% will graduate from college. If this trend continues, then in the long run, determine the proportion of the population that will be college graduates. Round your answer to the nearest hundredth.
A. 0.60 B. 0 C. 0.29 D. 0.40