Ascience teacher has 0.4 liter of seawater. she gives each of her 22 students a container and a 5 millimeter spoon. she then ask her students to put two spoonfuls of seawater into their container. how many milliliters of seawater will be left after all 22 students have filled their containers?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.