What is matrix?Explain with an example.

a rectangular array of quantities or expressions in rows and columns that is treated as a single entity and manipulated according to particular rules.

Step-by-step explanation:For example, the matrix A above is a 3 × 2 matrix. Matrices with a single row are called row vectors, and those with a single column are called column vectors. A matrix with the same number of rows and columns is called a square matrix.

81 seats

step-by-step explanation:

if you multiply 0.65 times 125 then you get 81.5 seats. well since you can't have half of a seat you have to round down and get 81 seats in the no children zones. that leave 44 seats outside of the no children zone.

tube or goog would be a great resource to with that question