Material=wall+2*side and material is 40 ft so:

40=w+2s

w=40-2s

Area=ws, using w from above we get:

A=(40-2s)s

A=40s-2s^2

dA/ds=40-4s and d2A/ds2=-4

Since d2A/ds2 is a constant negative acceleration, when dA/ds=0, A(s) is at an absolute maximum.

dA/ds=0 when 4s=40, s=10 ft

And since w=40-2s, w=20 ft

So the dimensions of the pen are 20 ft by 10 ft, with the 20 ft side being opposite the wall. And the maximum possible area is thus 200 ft^2

6 0

3 years ago

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On a piece of paper, sketch △ABC with m∠A=30° , m∠B=60° , and m∠C=90° . Which statements about the triangle are true? Select eac

gladu [14]

Answer:

Step-by-step explanation:i dont know duuu

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3 years ago

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Gemiola [76]

Yess what do you need help with

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2 years ago