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Problem

[[0.30,0.30,0.20,31],[0.20,0.20,0.30,77],[0.30,0.40,0.30,54]]

Solution

1. Identify the task as the summation of the elements within the provided matrix.

2. Sum the first row elements to find the partial total for that row.

0.30+0.30+0.20+31=31.80

3. Sum the second row elements to find the partial total for that row.

0.20+0.20+0.30+77=77.70

4. Sum the third row elements to find the partial total for that row.

0.30+0.40+0.30+54=55.00

5. Add the row totals together to find the final sum of all elements in the matrix.

31.80+77.70+55.00=164.50

Final Answer

(∑_^)(0.30)=164.5

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