The notation a35 refers to the entry in the _____ row and ______ column of a matrix.

Determine the order of the following matrix  (In the attached matrix)

Suppose A is a 2 × 2 matrix with real number entries such that AB=BA for all 2 × 2 matrices. What relationships must exist among the entries of A?  ineed a clear answer because i have a matrix answer in my book like the pic i uplo

The table below represents the data for the salaries of 4 secretarial workers at a local law firm. The first row represents each employee's wage per hour, and the next 6 rows represent the amount of hours each person worked for the corresponding days of this 1 week time period. (The law firm is closed on Sundays) Use matrix multiplication to find the amount of money this law firms paid their secretaries each day of the week.