Graph the polar equation.r = 
Identify the directrix and vertex. 
A. directrix: 3 unit(s) to the right of
the pole at x = 3
vertex: 
B. directrix: 3 unit(s) above
the pole at y = 3
vertex: 
C. directrix: 3 unit(s) below
the pole at y = -3
vertex: 
D. directrix: 3 unit(s) to the left of
the pole at x = -3
vertex: 
Answer: D
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Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the x-axis.x = 18 - y2, x = y2, y = 0
A. 162?
B. 
?
C. 
?
D. 81?
Solve the problem.When determining appropriate doses of medication, it is sometimes important to estimate the body surface area (BSA) of a patient. This surface area (in m2) can be approximated using the Mosteller formulaBSA = 
1/2,
where h is the patient's height in centimeters and w is the weight in kilograms. Determine the BSA for a patient with height 183 cm and weight 76 kg. Round your answer to two decimal places.
A. 3.86 m2 B. 14.93 m2 C. 1.97 m2 D. 0.03 m2
Write the following angles in degrees and minutes. Round your anwer to the nearest minute.138.37°
A. 138°22' B. 138°66' C. 138°33' D. 138°44'
If the legs of a right triangle are both n centimeters, then the length of the hypotenuse is
(a) 1/2 n2 cm (b) 2n ?2 cm (c) n2 ?2 cm (d) n ?2 cm (e) There is not enough information to determine the length.