The Temperature of Water in a Certain Lake on a Day

The temperature of water in a certain lake on a day in October can be determined by using the model y = 15.2 - 0.537x where x is the number of feet down from the surface of the lake and y is the Celsius temperature of the water at that depth. Based on this model, how deep in the lake is the Water 10 degrees? (Round to the nearest foot.)

A) 28 feet
B) 66 feet
C) 47 feet
D) 10 feet

Correct Answer:

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