In the expression $7^4$:

• The number 7 is the base.
• The number 4 is the exponent (or power).

This expression represents 7 raised to the power of 4, or $7 \times 7 \times 7 \times 7$.

Would you like to know more details or explanations about exponents?

Here are 5 related questions for further exploration:

1. How do you calculate $7^4$?
2. What are the rules of exponents when multiplying powers with the same base?
3. How do negative exponents affect the value of an expression?
4. What happens when the exponent is 0?
5. Can you explain fractional exponents and their relationship to roots?

Tip: When multiplying numbers with the same base, you add their exponents (e.g., $a^m \times a^n = a^{m+n}$).