Final answer:
After using 18 ft from the 45 ft roll of wire, the electrician has 27 ft left. She can cut 6 whole 4 ft sections from the remaining wire, as partial sections are not countable.
Step-by-step explanation:
The electrician has a roll with 45 ft of wire and uses 18 ft of it on one project. To find out how many 4 ft sections she will be able to cut from the remaining wire, we first calculate the amount of wire left after the initial use.
- Initial wire length: 45 ft
- Used wire length: 18 ft
- Remaining wire length: 45 ft - 18 ft = 27 ft
Next, we divide the remaining wire length by the length of each section she wishes to cut:
- Section length: 4 ft
- Number of sections: 27 ft / 4 ft per section = 6.75 sections
Since she cannot cut a partial section, the electrician can cut 6 whole 4 ft sections from the remaining wire.