Simplify the expression. Assume that all variables are positive when they appear.
- 7
- 6
A. -38x
B. -13x
C. -38x
D. -13x
Answer: A
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Find the surface area of the surface S.S is the paraboloid x2 + y2 - z = 0 between the planes z = 
and z = 2.
A. 
?
B. 
?
C. 
?
D. 
?
Choose the closest estimate.Identify the most reasonable unit to measure the height of a house.
A. Kilometers B. Meters C. Millimeter D. Centimeters
Provide an appropriate response. The minute hand on a grandfather clock cuts an angle of 30° as it moves from 12 to 1 on the clock face. If the minute hand is 16.7 cm long, what is the area of the clock face over which the minute hand moves from 12 to 1?
A. 4.4 cm2 B. 73.0 cm2 C. 9.8 cm2 D. 241.5 cm2
Find the center of mass of a thin plate of constant density covering the given region.The region in the first and fourth quadrants enclosed by the curves 
and 
and by the lines 
and 
A. 
= 0, 
= 
B. 
= 
, 
= 0
C. 
= 
, 
= 0
D. 
= 
, 
= 0