Calculate the percent composition of the compound that forms when 222.6 g N combines

completely with 77.4 g 0.

calculate to the nearest tenth of a percent.

13. A school is planning an excursion for all of their students to see the

penguins on Phillip Island. They find a company who can provide

two different types of coaches for the trip: one that holds 34

passengers and one that holds 51 passengers. The coach company

has 8 of the smaller coaches and 4 larger coaches available.

The hire cost $500 for a smaller coach and $700 for a larger coach.

If there are 374 students and teachers going on the trip,

determine the minimum total cost for the coach hire.