To simplify the expression \(\frac{t^7}{t^4}\) as a base to a power, you can use the property of exponents that states \(\frac{a^m}{a^n} = a^{m-n}\).
So, we can perform the following calculation:
\[ \frac{t^7}{t^4} = t^{7-4} = t^3 \]
Thus, the simplified expression in exponential notation is:
A. \(\frac{t^7}{t^4} = t^3\)