College Algebra (10th Edition)

$A^{-1}=\left[\begin{array}{rrrr} {0.01}&{0.04}&{0.00}&{0.03}\\ {0.02}&{-0.02}&{0.01}&{0.01}\\ {-0.04}&{0.02}&{0.04}&{0.06}\\ {0.05}&{-0.02}&{0.00}&{-0.09}\end{array}\right]$
Using desmos.com/matrix select "New matrix", define the dimensions, and enter the matrix entries... (see screenshot) Rounding to two decimal places, $A^{-1}=\left[\begin{array}{rrrr} {0.01}&{0.04}&{0.00}&{0.03}\\ {0.02}&{-0.02}&{0.01}&{0.01}\\ {-0.04}&{0.02}&{0.04}&{0.06}\\ {0.05}&{-0.02}&{0.00}&{-0.09}\end{array}\right]$