Write the standard form of the equation of the ellipse centered at the origin, having a horizontal major axis of 
units and a minor axis of 
units.
A. 
B. 
C. 
D. 
E. 
Answer: B
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Find all the second partial derivatives.f(x, y) = cos xy2
A. 
= -y4 cos xy2; 
= -2x[2xy2 cos(xy2) + sin(xy2)]; 
= 
= -2y[xy2 cos(xy2) + sin(xy2)]
B. 
= - y2 sin xy2; 
= 2y
; 
= 
= 2
C. 
= - y2 sin xy2; 
= 2[ sin (xy2) - 2y2 cos (xy2)]; 
= 
= 2y [sin (xy2) - y2 cos (xy2)]
D. 
= y2 sin xy2; 
= 2[2y2 cos (xy2) - sin (xy2)]; 
= 
= 2y[y2 cos (xy2) - sin (xy2)]
Solve the problem.If all of 48 available apple trees are to be planted in a rectangular array, what are the possible numbers of rows in the array, all rows having the same number of trees?
A. 8, 12, 16, 24, and 48 B. 1, 2, 3, 4, and 6 C. 1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 24, and 48 D. 1, 2, 3, 4, 6, 8, 12, 16, 24, and 48
Factor completely.-15p2 + 32p - 16
A. -(3p - 4)(5p - 4) B. (-3p + 4)(-5p + 4) C. -(15p + 4)(p + 4) D. -(3p + 4)(5p + 4)
The graph below is one complete cycle of the graph of an equation containing a trigonometric function. Find an equation to match the graph. If you are using a graphing calculator, graph your equation to verify that it is correct.
?
What will be an ideal response?