Classify the real number as a natural number, whole number, integer, rational number and/or irrational number. The number may belong to more than one set.-
A. irrational number
B. integer, rational number
C. rational number
D. integer
Answer: A
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Identify all of the symmetries in the following figure.
A. It has reflection symmetries; it can be reflected across a vertical line through its center, a horizontal line through its center, or either of its diagonals, and its appearance remains the same. B. It has translation symmetry (if imagined to extend in both directions). It also has reflection symmetry (across a horizontal line between the jagged lines). C. It has rotation symmetry; it can be rotated through 180° and its appearance remains the same. It also has translation symmetry (if imagined to extend in both directions). D. None of these.
Use cylindrical coordinates to find the volume of the indicated region.the region enclosed by the cylinder 
and the planes 
and 
A. 500? B. 250? C. 125? D. 375?
Evaluate the expression for the given replacement values. Write the answer in simplest form.
for x = 
, y = - 
A. - 
B. - 
C. - 
D. - 
In a 45°–45° triangle, the hypotenuse is always this multiple of the leg lengths.
(a) 2 (b) 2 ?2 (c) ?2 (d) ?2/2