Solve the problem.Find the center of mass of the upper half of a solid ball of radius 2 centered at the origin if the density at any point is proportional to the distance from that point to the 
A. (
, 
, 
) = 
B. (
, 
, 
) = 
C. (
, 
, 
) = 
D. (
, 
, 
) = 
Answer: C
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Use the figure showing isotherms for the United States to answer the question. 
If you were in Chicago and wanted to drive to cooler weather as quickly as possible, in which direction would you drive?
A. Northwest B. West C. Southwest D. East
Transform the equation to a form without an xy-term by a rotation of axes. Graph the curve.24xy - 7y2 + 36 = 0
A. 
B. 
C. 
D. 
Write the Hindu-Arabic numeral in expanded form.61
A. (1 × 101) + (6 × 1) B. (6 × 101) + (1 × 1) C. (6 × 102) + (1 × 10) D. (6 × 101)
Provide an appropriate response.Solve the following system of equations by first solving Equation (1) for x and then substituting for x in Equation (2). Then solve the system again by first solving Equation (1) for 2y and substituting for 2y in Equation (2). Which procedure do you prefer? Explain why you answered as you did.?x + 2y = 6(1)3x + 2y = 4(2)
What will be an ideal response?