In a theatre, the chairs are arranged in rows. The number of rows is 80 to the nearest ten, and there are exactly 35 chairs per row.
a) What is the least possible number of rows of chairs in the theatre?
b) 28 students on a school trip sit in a single row of chairs. What percentage of the seats in the row do they take up?
a) To find the least possible number of rows of chairs, we need to round down the number of rows to the nearest ten. Since the number of rows is already rounded to the nearest ten, the least possible number of rows is 80.
b) If there are exactly 35 chairs per row, and 28 students sit in a single row of chairs, then they take up 28/35 = 4/5 = 0.8, or 80% of the seats in the row.