5.5 m since you are finding the perimeter, you add up all the sides which equals 8.5 , since the total is 14 you subtract ,14 from 8.5 and you get 5.5. ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
The temperature after 5 hours is -1 degrees because 5 hours times -2 degrees each hour =-10 degrees. then, if you subtract 10 from nine you get the final answer of -1 degrees