# Beneath earths surface, the temperature increases 10 degrees Celsius every kilometer. Suppose That the surface temperature is 22 degrees Celsius, and the temperature at the bottom of a coal mine is 45 degrees celcius. Which equation could be used to find the depth d. of the coal mine? a. 10d+22=45 b. 45d-10=22 c. d=22+10 d. 22=10d+45

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