To solve the expression \( 3.2(5.6+3.4) \), we first need to calculate the sum inside the parentheses:
\[ 5.6 + 3.4 = 9.0 \]
Now, we can substitute this back into the expression:
\[ 3.2(9.0) \]
Next, we multiply:
\[ 3.2 \times 9.0 = 28.8 \]
Thus, the result of \( 3.2(5.6+3.4) \) is \( 28.8 \).