calculus

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4. You are at Lowes and a man is leaning against three sections of fencing that are 6,7 and 12 ft long. A Lowe’s person tells him to discard the 12 ft section and buy a 10ft section. She informs the customer that this would save money and would fence a bigger triangular area for his dog. At first you think she is wrong but later you determine she is right. How much more area does the dog gain if the owner gets the 10 ft section? Round to the nearest 10th of a square foot.

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