To determine how many bags of popcorn Damari needs to sell to reach his goal of $85, we can set up the equation based on his current amount of money and the price per bag.
- He starts with $40 and wants to have $85.
- Therefore, he needs to earn an additional \( 85 - 40 = 45 \) dollars.
- Each bag of popcorn sells for $3. To find out how many bags he needs to sell to earn $45, we divide: \[ \text{Number of bags} = \frac{\text{Total amount needed}}{\text{Price per bag}} = \frac{45}{3} = 15 \]
Thus, Damari needs to sell 15 bags to achieve his goal of $85.
The correct response is: 15