18. a science teacher has a supply of 20% saline solution and a supply of 50% saline solution. how much of each solution should the teacher mix together to get 60 ml of 28% saline solution for an experiment? (1 point) a) 16 ml of the 20% solution and 44 ml of the 50% solution b) 44 ml of the 20% solution and 16 ml of the 50% solution c) 16 ml of the 20% solution and 16 ml of the 50% solution d) 44 ml of the 20% solution and 44 ml of the 50% solution
i know the answer is b but could someone explain how to get that answer

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

answer: 5 17/33 % (to the tenth)

step-by-step explanation:

he guessed: 34.5 pounds

actual weight is 32.7

there for he is off:

34.5 -32.7 = 1.8

32.7 is the 100%

1.8 represents %? of 32.7

therefore:

32.7   - 100%

1.8     -     x%

x= 1.8*100%/32.7% = 18*100%/327%

x=1800%/327%   = (5 165/327)%

to the tenth:

5 17/33 %