Fill in the blank with one of the words or phrases listed below. 
is a measure of the amount of substance in an object. This measure does not change.
A. Mass
B. Weight
C. Volume
D. Area
Answer: A
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Find the vertices and foci of the ellipse.81x2 + 36y2 = 2,916
A. Vertices: (±6, 0); Foci: (±3
, 0)
B. Vertices: (0, ±6); Foci: (0, ±3
)
C. Vertices: (0, ±9); Foci: (0, ±3
)
D. Vertices: (±9, 0); Foci: (±3
, 0)
Provide an appropriate response.Solve the following using a system of equations: Two lengths of cable total 570 ft. One length is 30 ft longer than the other. How long is each cable?
Fill in the blank(s) with the appropriate word(s).
Solve the problem.Find the centroid of the region bounded above by the sphere 
and below by the plane 
if the density is constant.
A. 
= 0, 
= 0, 
= 
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 15
D. 
= 0, 
= 0, 
= 
Solve the system by substitution or elimination. If a system is inconsistent or has dependent equations, say so.x - 3y = 136x - 4y = -6
A. {(5, -5)} B. {(-5, -6)} C. {(-6, -5)} D. ?; inconsistent system