Posted by Channing on Thursday, January 21, 2010 at 4:56pm.
A box without a lid is constructed from a 38 inch by 38 inch piece of cardboard by cutting in. squares from each corner and folding up the sides.
a) Determine the volume of the box as a function of the variable .
b) Use a graphing calculator to approximate the values of that produce a volume of 3858.1875.
c)There are 3 values of that produce the given value but only two of them are acceptable in the context of the problem. List the two answers, to at least one decimal place.
*I don't even know how to start please help!

11th grade math  Damon, Thursday, January 21, 2010 at 5:10pm
length of box = 38  2x
width of box = 382x
volume of box = V = (382x)(382x)(x)
V = (1444152x+4x^2)x
V = 1444x 152x^2 +4x^3
that should get you started

11th grade math  Channing, Thursday, January 21, 2010 at 6:13pm
SO would I set both (1444152x+4x^2)x
and 1444x 152x^2 +4x^3 equal to 3858.1875 to find part c?

11th grade math  vianney, Thursday, February 4, 2010 at 9:49am
6x2  21xy + 8xz  28yz.

11th grade math  david, Friday, October 8, 2010 at 6:27pm
had this same probem for college precalculue couldn't solve B any other way but guess and check/logic x=4.5

11th grade math  david, Friday, October 8, 2010 at 6:38pm
secondary largest possible answre is
Answer: x⋅(382⋅x)2
Answer: 8.06181572077

11th grade math  Trevor, Wednesday, December 2, 2015 at 4:52pm
x values sould be 4.75 and 8.06........
so your answers are 4.8 and 8.1
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