Determine which elementary row operation(s) applied to the first matrix will yield the second matrix.
, 
What will be an ideal response?
R13
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Find the focus and directrix of the parabola.y = 5x2
A. (1/20, 0); x = -1/20 B. (0, 1/20); y = -1/20 C. (0, 1/20); y = 1/20 D. (1/5, 0); x = -1/5
Find n(A) for the set.A = {-8, -7, -6, ..., 0}
A. n(A) = 9 B. n(A) = 8 C. n(A) = 1 D. n(A) = 4
Find the center of mass of the thin rod with the given density function.Find the center of mass of a thin rod that lies along the semicircle y = 
if the density of the rod is 
A. 
= 
?, 
= 
?
B. 
= 
?, 
= 
?
C. 
= 0, 
= 
?
D. 
= 0, 
= 
?
The following double bar graph represents the number of students enrolled in the Welding and Machine Technology programs at a community college. Use the chart to answer the following question(s).
Which year saw the highest enrollment in the Machine Technology program, and which year saw the lowest enrollment?
A. 2005-2006 and 2004-2005 B. 2002-2003 and 2005-2006 C. 2002-2003 and 2003-2004 D. 2002-2003 and 2005-2006