To apply the Power Rule of Exponents, which states that \((a^m)^n = a^{m \cdot n}\), we can simplify the expression \((10^9)^7\).
Using the Power Rule: \[ (10^9)^7 = 10^{9 \cdot 7} = 10^{63} \]
Therefore, the correct response that uses the Power Rule is: 10 superscript 63 baseline (or \(10^{63}\)).