In the monomial 12s²t³, the degree of the monomial is determined by adding the exponents of each variable. In this case, the variables are s and t, and their exponents are 2 and 3, respectively.
To find the degree of the monomial, we add the exponents:
Degree = exponent of s + exponent of t
Degree = 2 + 3
Degree = 5
Therefore, the degree of the monomial 12s²t³ is 5.
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