Answer:
[tex]-421.627906977\^{\circ}M[/tex]
Explanation:
Absolute zero in the Kelvin scale = -273.15 °C
Temperature difference in the boiling and freezing point
[tex]-161-(-182.5)=21.5\ ^{\circ}C[/tex]
Change in 21.5°C = Change of 100°C in M
[tex]1^{\circ}C=\dfrac{100}{21.5}=4.6511627907\ ^{\circ}M[/tex]
Difference in the Celsius scale
[tex]-182.5-(-273.15)=90.65\ ^{\circ}C[/tex]
Change in [tex]90.65\ ^{\circ}C[/tex] corresponds to
[tex]4.6511627907\times 90.65=421.627906977\ ^{\circ}M[/tex]
Therefore the absolute zero in the Methane scale is
[tex]-421.627906977\ ^{\circ}M[/tex]