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A graphing calculator is recommended. In this problem you are asked to find a function that...

A graphing calculator is recommended. In this problem you are asked to find a function that models a real-life situation and then use the model to answer questions about the situation. Use the guidelines on page 237 to help you. A box with an open top is to be constructed from a rectangular piece of cardboard with dimensions 14 in. by 30 in. by cutting out equal squares of side x at each corner and then folding up the sides (see the figure). b) Find the values of x for which the volume is greater than 250 in3. (Round your answers to three decimal places. Enter your answer using interval notation.) Please Show how you got the answer, and what formula. Thank you

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