examples
•It’s 28˚C outside. What is that in F?
•TF = 1.8TC + 32
•TF = 1.8(28) + 32
•TF = 50. + 32
•TF = 82 ˚F
•It’s -40˚C in that lab freezer. What’s that in F?
•TF = 1.8TC + 32
•TF = 1.8(-40) + 32
•TF = -72 + 32
•TF = -40˚F  (!)