What is the degree of monomial 7a4b?

If you meant:

7a^4 b , then the degree would be 5

The degree of a monomial is the sum of the exponents of its variables. In the given monomial, 7a^4b, the exponent of "a" is 4 and the exponent of "b" is 1. To find the degree, simply add these exponents together:

Degree = 4 + 1 = 5.

So, the degree of the monomial 7a^4b is 5.