Re: more help please ok i got alot more stuff

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Posted by Subhotosh Khan on October 26, 2002 at 23:51:01:

In Reply to: more help please ok i got alot more stuff posted by billy on October 26, 2002 at 22:57:32:

: solve
: A machine produces open boxes using sqaure sheets of plastic. The machine cuts equal sized squares measuring 3 inches on a side from each corner of the sheet, ,and then shapes the plastic into an open box by turning up the sides. If each box must have a volume of 675 cubic inches, find the length of one side of the open box.

4x^(7/2)-8=0

4x^(7/2)=8

x^(7/2)=2

x = (2)^(2/7)

Use a calculator to solve it

: solve by substitution
: x^(2/3)+2x^(1/3)-8=0

: answers a){-4,2} b){-64,8} c){-8,64} d){-2,4}

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HTML tags are messed up - reposting Subhotosh Khan 23:54:15 10/26/02 (1)
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: : solve : : A machine produces open boxes using sqaure sheets of plastic. The machine cuts equal sized squares measuring 3 inches on a side from each corner of the sheet, ,and then shapes the plastic into an open box by turning up the sides. If each box must have a volume of 675 cubic inches, find the length of one side of the open box. : <font color="red> : Since the open box is made from square sheet and cutting off square pieces : - the bottom of the box must be square. : Let the side of the bottom = x : bottom area = x^2 : depthe of box = 3 : Volume of box = 3*x^2 : So: : 3*x^2 = 675 : x^2 = 225 : x = 15 : </font> : : solve : : 4x^(7/2)-8=0 : <font color="red> : 4x^(7/2)-8=0 : 4x^(7/2)=8 : x^(7/2)=2 : x = (2)^(2/7) : Use a calculator to solve it : </font> : : solve by substitution : : x^(2/3)+2x^(1/3)-8=0 : : answers a){-4,2} b){-64,8} c){-8,64} d){-2,4}

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