Evaluate the radical expression if it is a real number. Use a calculator to approximate irrational numbers to the nearest hundredth. If the expression is not a real number, so state.
A. -36
B. -3
C. -12
D. not a real number
Answer: D
Mathematics
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Simplify the expression by using the order of operations.(2 + 3)[3 + (3 + 6)]
A. 60 B. 13 C. 17 D. 24
Mathematics
Solve.The air pollution, y, in appropriate units, in a large industrial city has been growing as shown by the graph below, where x is time in years from 1990. That is, x = 0 represents 1990. Approximate the air pollution in the year 2005 (x = 15) to the nearest thousand.
A. 20,000 B. 18,000 C. 15,000 D. 22,000
Mathematics
Graph the curve whose parametric equations are given.x = t2, y = 
+ 2; 0 ? t ? 4 
A. 
B. 
C. 
D. 
Mathematics
Solve the inequality.
< 9
A. 
B. 
or 
C. 
or 
D. 
or 
Mathematics