Final answer:
The degree of the given expression is 1 if we consider typical polynomial terms, which only have whole number exponents. The term with the highest whole number exponent in the expression is x, which has an exponent of 1.
Step-by-step explanation:
The degree of a polynomial is the highest exponent of the variable in any term of the polynomial. In the given expression (6x9.47 × 2.3 + x), we initially look at the first term, 6x9.47, which is raised to the power of 9.47. When considering the entire expression, we only look at whole number exponents for the purposes of determining the degree, as fractional or decimal exponents indicate a root, rather than a degree in a polynomial context. However, in this case, if we corrected the assumption that the exponent is meant to be a whole number and interpreted the expression in the usual way we understand polynomials, it would imply a term with an exponent of 9 (if we round the 9.47 down to the nearest whole number), which is a high-degree term. The other term, x, is simply x1 which has a degree of 1. Therefore, the degree of the polynomial is the greater exponent, which we would consider to be 9 if we were rounding down the original decimal exponent to the nearest whole number.
However, because the question seems to contain a typo with 9.47, and if we interpret the expression correctly within the normal rules of polynomials (without decimals in exponents), the degree would simply be 1.
Thus, the correct answer is A. 1