A science teacher has 0.4 liter of seawater. She gives each of her 22 students a container and a 5- milliliter spoon. She then asks her students to put 2 spoonfuls of seawater into their containers. How many milliliter a of seawater will be left after all 22students have filled their containers?A. 70B. 180C. 290D. 780

0.4L = 400ml
Each student effectively adds 10ml of water so 22 students are adding 10ml of water each. Therefore, 22 x 10 = 220ml total in all the containers added by all 22 students
Water left = 400 - 220 = 180

The answer is B.