For the volume of soap in a bottle, Ryan determined the margin of error as 354.85 mL to 354.95 mL. What was the volume of soap that he measured?

The measured volume is the midpoint of the interval from 354.85 mL to 354.95 mL. The midpoint is (354.85 + 354.95) ÷ 2 = 354.9 mL, so Ryan measured 354.9 mL.

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