Jawabanmu

2014-05-15T14:30:18+07:00
9. 140 F = 48 R
10. 68 R = 85 C
11. 90 C = 363 K
12. 253 K = -20 C = -4 F

Note: Satuan kelvin tidak pakai derajat.
2014-05-15T20:39:49+07:00
140°F=...°R
=4/9 (140-32)=48°R
68°R=...°C
=5/4(68)=85°C
90°C=...K
=273+90=363
253K=...°F
=9/5 (253-273)=-36°F