Respostas

2014-04-02T18:52:33-03:00
F-32 = C  
  9       5

F-3220  
  9       5

F-32
= 4
  9

F - 32 = 4 . 9
F - 32 = 36
F = 36 + 32
F = 68 ºF 
1 5 1
2014-04-02T19:35:10-03:00
Tf =1,8.Tc+32

Nesse caso:
Tf =1,8.20+32
Tf =68ºF