The area of the surface is 144.708
The equation of the given surface is,
z=g(x,y)=xy
Solving the partial derivatives,
∂g∂x=y,∂g∂y=x
Substituting to the formula
S=∬√1+( ∂g∂x)2+(∂g∂y)2dA
Thus,
S=∬√1+(y)2+(x)2dAS=∬√1+x2+y2dA
The region in the XY-plane is defined by the intervals 0≤θ≤2π,0≤r≤4
Converting the integral into polar coordinates,
S=∫2π0∫40√1+r2rdrdθ
Integrating with respect to r
S=∫2π0[13(1+r2)32]40dθ
S=∫2π0(17√173−13)dθ
Integrating with respect to θ
S=(17√173−13)[θ]2π0
S≈144.708
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The first thing we need to know is that the Jennifer-Chelsea ratio is as follows:
3: 2
Equivalently:
3/2
To know how much Jennifer invests, we have to:
(3 / (2 + 3)) = x / 125000
Clearing x:
x = 125000 * (3 / (2 + 3)) = 75000
answer
Jennifer invest 75000 $
Answer:
the answer is A give me brainliest
3,4,7 just plug the x into the equation
