The speed of the computers is measured in number of calculations per picosecond. there are 3.6*10 to the fifteenth power picoseconds per hour. what fraction of a second is a picosecond.

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