Thursday

April 24, 2014

April 24, 2014

Posted by **tonya** on Sunday, April 5, 2009 at 11:49pm.

- business calculus -
**drwls**, Monday, April 6, 2009 at 2:40amVolume = pi r^2 h = 20 pi (m^3)

Therefore r^2 h = 20

h = 20/r^2

Cost = 2 pi r^2 * 10 + 2 pi r h * 8

= 20 pi r^2 + 16 pi r(20/r^2)

= 20 pi r^2 + 320 pi/r

Set the derivative with respect to r equal to zero.

40 pi r = 320 pi r^-2

r^3 = 80

r = 4.31 m

Check my math

**Related Questions**

Math/Standard and scientific notation - Express each measure in standard form. (...

Algebra - Factor each of following expressions x (4th power) - x (3rd power) - ...

calculus - A cylindrical container is to hold 20π cm^3. The top and bottom ...

math - 3 to the 5th power / 3 to the 2nd power= ?? 22 24 23 26 27 2100 213 (3^5...

Intermediate Algebra - add or subtract the following polynomials as indicated (5...

math - what is (x to the 3rd power + x to the 2nd power) divided by ((x+4)(X-4...

dividing monomials - i dont know what to do when their is a smaller number on ...

8th Clinton Junior High School - What is the Dividing Power of 12 a to the 2nd ...

math 115 - - (-4)3rd power + (-3)2nd power - .5 3rd power is 72.875 correct? The...

algebra - 7s over 5t to the negative 3rd power 2 to the negative 3rd power times...