The total cost of 100 pencils purchased at a constant rate is $39.00. What is the unit price?

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1 point
$39.00
$3.90
$0.39
$0.039

To find the unit price, we divide the total cost by the quantity. In this case, the total cost of 100 pencils is $39.00, so the unit price is $39.00/100 = $0.39. Therefore, the correct answer is $0.39.