Felix works as a technician for Xfinity and installs 22 gauge communication wire at his sites. On one hot summer day, his truck sufficiently heated all of his reels of wire to a toasty 123 degrees Fahrenheit. He is unsure if he has sufficient Aluminum wire for his project, so he measures the hot resistance of a spool of wire to be 6.21 ohms. Which of the following answers below are most nearly how much wire is left in this spool?
What formula would I use for this? My professor speaks too fast for me to understand

Question

Felix works as a technician for Xfinity and installs 22 gauge communication wire at his sites.  On one hot summer day, his truck sufficiently heated all of his reels of wire to a toasty 123 degrees Fahrenheit.  He is unsure if he has sufficient Aluminum wire for his project, so he measures the hot resistance of a spool of wire to be 6.21 ohms.  Which of the following answers below are most nearly how much wire is left in this spool?
What formula would I use for this? My professor speaks too fast for me to understand

causticsyndicalist · Answer

@cookiemonster2412 
Since the PM wasn't received. :P