In which type of organization is decision-making authority retained at the top level of management?

FInd the number of all possible matrices of order

$3\times 3$ with each entry $0$ or $1$.

Write the minor and cofactor of element of the first column of the following matrix and hence evaluate the determinant in each case:

$A=\left[\begin{array}{cc}5& 20\\ 0& -1\end{array}\right]$

Write the minor and cofactor of element if the first column of the following matrix and hence evaluate the determinant in each case:

$A=\left[\begin{array}{cc}-1& 4\\ 2& 3\end{array}\right]$

Write the minor and cofactor of element of first column of the fllowing  matrix and hence evaluate the determinant in each case:
$A=\left[\begin{array}{cccc}2& -1& 0& 1\\ -3& 0& 1& -2\\ 1& 1& -1& 1\\ 2& -1& 5& 0\end{array}\right]$

Write the minor and cofactor of element of the first of the first column of the following matrix and hence evaluate the determinant in each case :

$A=\left[\begin{array}{ccc}1& -3& 2\\ 4& -1& 2\\ 3& 5& 2\end{array}\right]$

Write the minor and cofactor of element of the first column of the following matrix and hence evaluate the determinant:

$A=\left[\begin{array}{ccc}a& h& g\\ h& b& f\\ g& f& c\end{array}\right]$