To find out how much Dave and his sister paid for both pumpkins, we first need to calculate the weight of each pumpkin, and then multiply the total weight by the price per pound.
- Weight of Dave's pumpkin: 13.24 pounds
- Weight of his sister's pumpkin: 10.6 pounds
Now, let's find the total weight:
\[ \text{Total weight} = 13.24 , \text{pounds} + 10.6 , \text{pounds} = 23.84 , \text{pounds} \]
Next, we multiply the total weight by the cost per pound:
\[ \text{Cost per pound} = 0.47 \]
\[ \text{Total cost} = 23.84 , \text{pounds} \times 0.47 , \text{per pound} = 11.2028 \]
Now, rounding to two decimal places:
\[ \text{Total cost} \approx 11.20 \]
Therefore, Dave and his sister paid approximately $11.20 for both pumpkins.