Sketch the graph of $$A(x)$$A(x) and label the vertexThe graph is a downward-opening parabola with vertex at $$(10, 200)$$(10,200)The axis of symmetry is $$x = 10$$x=10The domain is $$0 < x < 20$$0<x<20, because $$l = 40 - 2x$$l=40−2x must be positive, so $$40 - 2x > 0 \Rightarrow x < 20$$40−2x>0⇒x<20Note: Since I cannot draw here, I recommend plotting the parabola with the vertex at $$(10, 200)$$(10,200), opening downward, crossing the x-axis at points where $$A(x) = 0$$A(x)=0

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Sketch the graph of $$A(x)$$A(x) and label the vertexThe graph is a downward-opening parabola with vertex at $$(10, 200)$$(10,200)The axis of symmetry is $$x = 10$$x=10The domain is $$0 &lt; x &lt; 20$$0&lt;x&lt;20, because $$l = 40 - 2x$$l=40−2x must be positive, so $$40 - 2x &gt; 0 \Rightarrow x &lt; 20$$40−2x&gt;0⇒x&lt;20Note: Since I cannot draw here, I recommend plotting the parabola with the vertex at $$(10, 200)$$(10,200), opening downward, crossing the x-axis at points where $$A(x) = 0$$A(x)=0​

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