Approximate the square root. Round to the nearest tenth, if needed.
A. 1.7
B. 1.6
C. 2.7
D. 1.8
Answer: A
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Solve the rational inequality. Write the solution set using interval notation; then graph the solution set on a number line.
> 0
A. 
B. 
C. 
D. (-?, 0)
Solve the problem.An express train and a local train both leave Gray's Lake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find the speed of each train.
A. Express: 25 mph; local: 12.5 mph B. Express: 60 mph; local: 30 mph C. Express: 50 mph; local: 25 mph D. Cannot be determined without more information
Convert.6.87 meters = _____ hectometer
A. 687 B. 0.687 C. 0.0687 D. 68.7
Find all solutions of the equation in the complex number system.x3 - 1 = 0
A. {1}
B. {1, - 
+ 
, - 
- 
}
C. {1, - 
+ 
i, - 
- 
i}
D. {1i, - 
+ 
i, - 
- 
i}