To determine how many bags of popcorn Damari needs to sell, we can set up the following equation:
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Calculate how much more money he needs to reach his goal: \[ \text{Amount needed} = \text{Goal} - \text{Current Amount} = 85 - 40 = 45 \]
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Since he sells each bag for $3, we can find out how many bags he needs to sell to make that $45: \[ \text{Number of bags needed} = \frac{\text{Amount needed}}{\text{Price per bag}} = \frac{45}{3} = 15 \]
Therefore, Damari needs to sell 15 bags of popcorn to reach his goal of $85. The correct response is:
15