MATH SOLVE

4 months ago

Q:
# Andre wants to make an open-top box by cutting out corners of a 22 inch by 28 inch piece of poster board and then folding up the sides. The volume in cubic inches of the open-top box is a function of the side length in inches of the square cutouts.Write an expression for .What is the volume of the box when ?What is a reasonable domain for in this context?

Accepted Solution

A:

Answer:Step-by-step explanation:THE box volume is V = (length)(width)(height). Representing the cutout side length by x, we get the formula V = (28 - 2x)(22 - 2x)(x). Explanation: We are to cut out x by x squares, one at each corner of the 28 by 22 inch board; thus, the bottom length is 28 - 2x, the bottom width 22 - 2x and the height just x.You may either leave this expression as is, or perform the multiplication and simplify the result.If x = 2 (which I have chosen arbitrarily because you have not specified x), then the box volume isV = (28 - 2*2)(22 - 2*2)(2), orV = (24)(18)(2) cubic inches.Since x is a measurement of length, it cannot be less than zero. Likewise, since the width of the bottom of the box cannot be less than zero, we have the following inequality for x: 22 - 2x > 0, or11 - x > 0, or x < 11.Suppose that x = 10, as a check. Then V = (28 - 20)(22 - 20)(10). Is this greater than zero? YESTherefore x < 11 is a readonable domain in this context.