(a) 700-452 = 248 tickets were not sold.
(b) 2979.5+39919.5 = 10602. The total amount of money paid for these tickets is approximately £10602.
(c) The answer to part (b) is an underestimate because we have rounded the numbers 9.5 and 19.5 down to 9 and 19 respectively.
For question (a), we simply subtract the number of tickets sold from the total number of tickets that were on sale.
For question (b), we first multiply the number of tickets sold for each price by the corresponding price. Then, we add the two products to get the total amount of money paid for the tickets.
For question (c), we reason that rounding the prices down will result in a lower product. Therefore, our answer is an underestimate.
248 tickets were not sold. The total amount of money paid for the tickets is approximately £10602. This is an underestimate.