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December 18, 2014

December 18, 2014

Posted by **Brenda** on Saturday, November 17, 2012 at 3:11pm.

for a) I have dV/V = 0.00069 - this is correct.

for b) the area I have 4/3 x pi x r^3.

I did the following:

Try 1 - 0.00069 = 4/3 x pi x dr^3 - wrong

Try 2 - then I took the cube root of 0.00069 and got 0.088 - wrong.

Try 3 - I used the same factor of 0.00069 since the radius is all that is changing in the equation - wrong.

Try 4 - I tried factoring dr = rfinal - rinitial and I'm left with something I don't know how to deal with.

HELP! Is it 4 and I need to use some algebra technique I can't remember how to do???

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