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The surface area of a ball is measured to be A = 45 cm2. A) Write...

The surface area of a ball is measured to be A = 45 cm2.

A) Write an equation for the radius of the ball, r, treating it as a sphere, in terms of its surface area. ( I tried square root of A/4pi, didn't work)

B)  The mass is measured to be M = 125 g. Calculate its density ρ in g/cm3.


C)What is the density ρkg/m3 in kg/m3?

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