Aferryboat makes four trips to an island each day. the ferry can hold 88 people. if the ferry is full on each trip, how many passengers are carried by the ferry each day?

Multiplication was invented to reduce the work involved in repeated addition.

... 88 + 88 + 88 + 88 = 4×88 = 352

352 passengers are carried to the island each day.

Some questions must be answered before we can give a definite answer.

1. If the same person rides twice, are they counted twice?

2. Are passengers on the return trips (from the island) counted?

3. If return trip passengers are counted, is the ferry full on those trips?

4. Does every passenger to the island return the same day?

5. Does any passenger go to the island more than once per day?

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

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