If z = 2 x y - 3x²y and x is increasing at 2 cm/s, determine at what rate y must be changing so that z shall be neither increasing nor decreasing at the instant when x = 3 cm and y = 1 cm. If z = 2 x y - 3x²y and x is increasing at 2 cm/s, determine at what rate y must be changing so that z shall be neither increasing nor decreasing at the instant when x = 3 cm and y = 1 cm.

b

step-by-step explanation:

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

the radius is 2 times the diameter.

step-by-step explanation:

multiple all that

step-by-step explanation:

27×17