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dahlia is simplifying \\((3t)^4\\) using these steps: \\((3t)^4 = 3t \\…

Question

dahlia is simplifying \\((3t)^4\\) using these steps:

\\((3t)^4 = 3t \cdot 3t \cdot 3t \cdot 3t = 3 \cdot 3 \cdot 3 \cdot 3 \cdot t \cdot t \cdot t \cdot t\\)

although dahlia is correct so far, which step could she have used instead to simplify the expression \\((3t)^4\\)?

\\(\bigcirc\\) \\(3^4 \cdot 3t^4\\)
\\(\bigcirc\\) \\(3^4 t = 81t\\)
\\(\bigcirc\\) \\(4(3t) = 12t\\)
\\(\bigcirc\\) \\(3^4 t^4 = 81t^4\\)

Explanation:

Identify the given expression and target rule

$$ (3t)^4 $$

Apply the power of a product rule

$$ (3t)^4 = 3^4 \cdot t^4 $$

Simplify the numerical base

$$ 3^4 \cdot t^4 = 81t^4 $$

Answer:

  • (A) \(3t^4 = 3t^4\)
  • (B) \(3^4t = 81t\)
  • (C) \(4(3t) = 12t\)
  • (D) \(3^4t^4 = 81t^4\) (Correct answer)