a school bus has 25 seats with 5 rows of 5 seats. 15 students from first grade and 5 from second grade travel in the bus. How many ways can the students be seated if all the second grade students occupy the first row on the bus?

Fifty students are trying to raise at least 12,500 for a class trip. they have already raised 1,250. how much should each student raise on average in order to meet the goal? write and solve the two step inequality for this problem