
Cardiology The aortic pressure-diameter relation in a particular patient who underwent cardiac catheterization can be modeled by the polynomial
D(p)=0.000002p3−0.0008p2+0.1141p+16.683
55≤p≤130
where D(p) is the aortic diameter (in millimeters) and p is the aortic pressure (in mm Hg). Determine where this function is increasing and where it is decreasing within the interval given above. Source: Circulation.

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