Form an equivalent expression by rationalizing the denominator.
A. 3
B. 3
C. 
D. 
Answer: D
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Evaluate the integral.
A. 
B. 
C. 
D. 
Estimate the answer to the problem.A mobile library has 1029 books in its collection. If there are 21 shelves in the library, then how many books, on average, are stacked on each shelf?
A. 55 B. 60 C. 50 D. 46
Provide an appropriate response.Ben drove his car 682 kilometers in 7 hours while he was on vacation in Italy. He was trying to estimate how far he could drive in 8 hours the next day so he set up the following proportion: 
Explain why this proportion will not give him the correct answer.
What will be an ideal response?
For the given equation, state whether the directrix is vertical or horizontal and give its location in relation to the pole.r = 
A. Horizontal, 
units below the pole
B. Vertical, 9 units to the left of the pole
C. Horizontal, 9 units below the pole
D. Vertical, 
units to the left of the pole