The water acidity in a pool is considered normal when the average pH reading of three daily measurements is between ` 8.2 and 8.5` If the first two pH readings are `8.48 and 8.35`, then find the range of pH value for the third reading that will result in the acidity level being normal.

Explanation

To solve the problem step by step, we need to find the range of the third pH reading (let's call it \( x \)) that will keep the average pH of the three readings between 8.2 and 8.5.

### Step 1: Set Up the Average
The average pH of the three readings can be expressed as:
\[ \text{Average} = \frac{8.48 + 8.35 + x}{3} \]

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