Can u please help me quickly??? How much water should you boil off of a 30 gal solution of 10% salt to increase it to 15% salt?

Ithink it’s b because it say 3 plastic rings and all the balls

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.