Mathematics, 22.03.2021 14:00 Falconpride847

The diameter of a balloon varies inversely with the thickness of the rubber. The diameter of the balloon is 80 mm when the rubber is 2 mm thick.
a)Find an equation for the diameter D in terms of the thickness x.
b)Find the diameter when the thickness is 0.8 mm.
c) Find the thickness correct to one decimal place when the diameter is 115.3 mm.
d) Sketch the graph showing this information.

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