February 23, 2017

Homework Help: math

Posted by Emma on Thursday, September 30, 2010 at 8:13pm.

What is the Surface area of a glass bead that has the diameter of 11m? Express your answer to the nearest square mm.

A glass bead would be a sphere. So the formula for that is-->

SA = 4ðr^2
= 4ð(5.5^2)
= 380mm^2

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