Jawabanmu

2014-06-07T08:21:28+07:00
TC = 5/9.(77-32)
    = 5/9.45
    = 25°C
tk = 25+273
    = 298 K
2014-06-07T15:11:50+07:00
T c = 5/9.( tf-32)                          t K = tc + 273
tc = 5/9 . (77-32)                        t K =25 + 273
tc = 5/9 . (45)                            t K = 298
tc = 5.5
tc =25        so, kelvin = 298