There are 15 sixth graders, 10 seventh graders, and 16 eighth graders in a gym class. The gym teacher is randomly selecting one student to collect the balls. In how many ways can the gym teacher choose a student?

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.