Jawabanmu

2014-04-07T08:38:30+07:00
Fahrenheit = 9/5 x (-40) + 32 = -72 + 32 = -40, Reamur = 4/5 x (-40) = -32
2014-04-07T09:15:41+07:00
Rumusnya : 

Celsius ke Reamur = Celcius x 0,8 = -40 X 0,8 = -32R
Celcius ke Fahrenheit = (Celcius X 1,8 ) + 32 = ( -40 X 1,8 ) + 32 = -72 + 32 = -40F