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Answer:

The value of given expression is 27.1

C is correct

Step-by-step explanation:

Given: \(\dfrac{1}{2}x^3+3.4y\)

We are given an expression of two variable x and y.

We need to find the value of expression at x=3 and y=4

Put x=3 and y=4 into expression and simplify

\(\Rightarrow \dfrac{1}{2}\cdot 3^3+3.4\times 4\)

\(\Rightarrow \dfrac{1}{2}\cdot 27+13.6\)

\(\Rightarrow \dfrac{27}{2}+13.6\)

\(\Rightarrow 13.5+13.6\)

Add both number

\(\Rightarrow 27.1\)

Hence, The value of given expression is 27.1

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