The correct answer is: [A]: "1" .
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There is one (1) solution to the equation given:
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√x = 7 .
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The solution is: x = 49.
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Let’s see..................
A. $3,291.15
You have the total for one pallet, multiply by how many he bought (13), then add the delivery fee. ($125) to get your answer of $3,291.15