To find the cost per pound of butter, we can divide the total cost by the weight. In this case, we have a 3-pound tub of butter that costs $3.85.
To calculate the cost per pound, we divide the total cost of $3.85 by the weight of 3 pounds:
$3.85 / 3 pounds = $1.283 per pound
Therefore, the cost per pound of butter is approximately $1.283.