Solve the problem.Find the center of mass of the solid enclosed between the cone with equation 
and the plane with equation 
if the density at any point is proportional to the distance from that point to the plane 
.
A. (
, 
, 
) = 
B. (
, 
, 
) = 
C. (
, 
, 
) = 
D. (
, 
, 
) = 
Answer: C
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The graph of an exponential function is given. Match the graph to one of the following functions.
A. f(x) = - 2-x B. f(x) = - 2x C. f(x) = 2-x D. f(x) = 2x
Find the LCD for the pair. Write the fraction pair as equivalent fractions with the LCD as their denominators.
, 
A. 3(x - 3)(x + 6); 
, 
B. 3(x + 3)(x + 6); 
, 
C. 3(x - 3)(x - 6); 
, 
D. 3(x + 3)(x - 6); 
, 
Solve the system by substitution. If the system is inconsistent or dependent, say so.y = -5x-5x + y = -10
A. (1, -5) B. (-1, -5) C. (1, 10) D. (-1, 5)
Mary bought pound of two sorts of cookies for $1 per pound. If cookies with apricot jam $0.90 per pound and cookies with lemon jam $1.20 per pound, how many pounds of cookies with apricot jam did she buy?NOTE: Round your answer to the nearest tenth.
A. 0.7 lb. of cookies with apricot jam B. 0.8 lb. of cookies with apricot jam C. 0.5 lb. of cookies with apricot jam D. 0.6 lb. of cookies with apricot jam E. 0.9 lb. of cookies with apricot jam