Simplify the Expression $8 \cdot ( 8 - 1 ) + \sqrt { 64 }$

question 8

Multiple Choice

Simplify the expression.
- $8 \cdot ( 8 - 1 ) + \sqrt { 64 }$

• A) 120
• B) 80
• C) 64
• D) 71

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Internal Validity

The extent to which a study establishes a trustworthy cause-and-effect relationship between a treatment and an outcome, avoiding confounding variables.

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