HELP PLS!! JoAnna is in a mathematics class of 25 students that participated in this test. JoAnna knows that she scored an 80 on the test and reasons that, since only 2.5% of the students score above a 75 and there are only 25 students in her class, that it is highly likely that she received the top score of all the students in her class. Is this good reasoning?

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

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.

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'