Answer:
To find out if Flora and Otto have enough ribbon to complete their group project, we need to convert both Flora and Otto's ribbon lengths to the same unit (feet), and then calculate the total length of ribbon they have.
1. **Convert Flora's ribbon from yards to feet**:
- 1 yard is equal to 3 feet.
- Flora has 5 yards of ribbon.
- Convert 5 yards to feet: \(5 \text{ yards} \times 3 \text{ feet/yard} = 15 \text{ feet}\).
- Flora has 15 feet of ribbon.
2. **Calculate the total length of ribbon**:
- Otto has 13 feet of ribbon.
- Total ribbon Flora and Otto have is the sum of Flora's ribbon (in feet) and Otto's ribbon:
- Total ribbon = \(15 \text{ feet} + 13 \text{ feet} = 28 \text{ feet}\).
3. **Compare the total ribbon length to the required length**:
- They need 23 feet of ribbon to complete their group project.
- The total ribbon they have is 28 feet, which is greater than the required 23 feet.
Therefore, Flora and Otto **do have enough** ribbon to complete their project, as they have 28 feet of ribbon, which is more than the required 23 feet.