Determine whether the matrix is in row-echelon form. If it is, then determine also whether it is in reduced row-echelon form.
A. Yes; yes
B. Yes; no
C. No
Answer: C
Mathematics
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Sketch the surface z = f(x,y).f(x, y) = 2 -x2 - y2
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Carla LaFong worked a 58 hr work week last week. She is paid 
times her regular hourly rate for all hours over a 40 hr week. Her pay last week was $777.20$. What is her hourly rate?
A. $11.35 B. $12.90 C. $11.60 D. $11.70
Mathematics
Find the vector projv u.v = 2i - 2j - 4k, u = 12i - 5k
A. 
i - 
k
B. 
i - 
j - 
k
C. 
i - 
k
D. 
i - 
j - 
k
Mathematics
Graph the function.y = 
sin 
A. 
B. 
C. 
D. 
Mathematics