Again?
http://www.jiskha.com/display.cgi?id=1413057054
The volume of a cube is increased from 729 cubic centimetres to 849.285 cubic centimetres.
Use differentials to determine:
a) by approximately how many centimetres the side length of the cube increases ?
B) by approximately how many square centimetres does the surface area of the cube increase ?
3 answers
ya i just didn't get the second part because its volume not the surface area and i got a big number I'm not sure about it
a = area = 6 x^2
da/dx = 12 x
so
da = 12 x dx
da/dx = 12 x
so
da = 12 x dx
3 answers