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January 31, 2015

January 31, 2015

Posted by **John** on Sunday, March 24, 2013 at 12:49pm.

- Math- Calculus -
**Anonymous**, Sunday, March 24, 2013 at 1:06pmFind the compound interest and the compound amount of the following #2ooo at 4/2 % compounded annually for 7yr

- Math- Calculus -
**Steve**, Sunday, March 24, 2013 at 1:35pmsince pi r^2 h = 500, h = 500/(pi r^2)

the cost function is

c = 40 * 2pi r h + 2*50*pi r^2

= 80 pi r (500/(pi r^2)) + 100 pi r^2

= 40000/r + 100 pi r^2

dc/dr = 200 pi r - 40000/r^2

= 200 (pi r^3 - 200)/r^2

dc/dr = 0 when pi r^3 = 200

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