Question

Of the following approximate conversions of Celsius into Fahrenheit, which is most accurate?
a.
24°C Almost-equals 75.9°F
b.
2°C Almost-equals 35.8°F
c.
34°C Almost-equals 92.7°F
d.
13°C Almost-equals 55.0°F

Answer 1

Use F = 1.8C + 32.

a. 24°C → 75.2°F (given 75.9), error = +0.7°F
b. 2°C → 35.6°F (given 35.8), error = +0.2°F
c. 34°C → 93.2°F (given 92.7), error = −0.5°F
d. 13°C → 55.4°F (given 55.0), error = −0.4°F

Smallest absolute error is b. So 2°C ≈ 35.8°F is most accurate.