Answer:
See Explanation
Step-by-step explanation:
The question is incomplete as the matrix is not given.
The general form of a matrix is:
![b[m*n] =\left[\begin{array}{ccc}b_{11}&b_{12}&b_{13}........b{1n}}\\b_{21}&b_{22}&b_{23}........b{2n}\\b_{31}&b_{32}&b_{33}........b{3n}\\ \\ \\b_{m1}&b_{m2}&b_{m3}........b{mn}\end{array}\right]](https://tex.z-dn.net/?f=b%5Bm%2An%5D%20%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Db_%7B11%7D%26b_%7B12%7D%26b_%7B13%7D........b%7B1n%7D%7D%5C%5Cb_%7B21%7D%26b_%7B22%7D%26b_%7B23%7D........b%7B2n%7D%5C%5Cb_%7B31%7D%26b_%7B32%7D%26b_%7B33%7D........b%7B3n%7D%5C%5C%20%5C%5C%20%5C%5Cb_%7Bm1%7D%26b_%7Bm2%7D%26b_%7Bm3%7D........b%7Bmn%7D%5Cend%7Barray%7D%5Cright%5D)
Where m and n represent the
respectively.
Notice the position of b11
This means that b11 is at the first column and first row.
Take for instance matrix b is:
![b = \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]](https://tex.z-dn.net/?f=b%20%3D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%262%263%5C%5C4%265%266%5C%5C7%268%269%5Cend%7Barray%7D%5Cright%5D)
The element at the first row and first column is 1.
Hence

I think it is 192 inches long?
A = lw
A = (3 1/4)*(2 1/2) A = (13/4)*(5/2) A = 65/8<span> A = 8 1/8 ft3 </span>
It is option d because addition is associative for integers.
Hope it helps :)