29. In Westville on Tuesday, the high temperature was 30℃ and the low temperature was 20℃. What was the difference between the high and low temperatures, in degrees Fahrenheit?

(Note: The relationship between the temperature c, in degrees Celsius, and the temperature f, in degrees Fahrenheit, is given by .)

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

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if Substitute directly, Δc = c2 - c1 = 5/9 (f2 - 32) -5/9 (f 1 - 32) = 5/9 (f2 - f1) = 5/9 Δf. Since Δc = 10 , Δf = 18 .