Answer:
Each computer costs £279.
37 computers will be needed.
a)Estimate how much money will she need altogher to purchase the computers?
£279 · 37 = £10,323
b) Estimate how much tickets will she need to sell in order to buy all of the computers? Susana plans to sell each raffle ticket for £1.89.
£10,323/£1.89 = 5461.905 tickets.
c) On Thursday, the day before the raffle, Susana had sold 4176 tickets. Estimate how many more tickets she will need to sell in order to buy all of the computers.
5461.905 tickets - 4176 tickets = 1285.905 tickets ≈ 1286 tickets