Respuesta :
As per the problem
There are 146 students 5 teachers, and 8 chaperones going to the theatre.
Each row has 8 seats.
So Total number of seats required[tex] =146+5+8=159\\ [/tex]
Now to know the number of rows required, divide the total number of seats required by capacity of one row
Number of Rows required to reserve [tex] =\frac{159}{8}= 19.875\\ [/tex]
Since as per the problem, To reserve their seats, they need to reserve entire row.
So Number of Rows to reserve=20