Answer:
400milliliters
Step-by-step explanation:
Let x=ml of 30% solution B used in resulting mixture.
800+x=ml of resulting 30% solution
40%(800)+10%x=30%(800+x)
Then we can simplify the expression
0.4(800)+0.10x= 0.30(800+x)
320+0.10x=240+0.30x
80=0.20x
x= 400milliliters
Therefore, 400milliliters of 10% solution B used in resulting mixture.
15 min...................
The answer is B.
In this problem, we have

In the table "200" stands for the points which a player earns.
In the other hand, "3" is under 'Stars Awarded'.
The corresponding choice is "A player who earns 200 points is awarded 3 stars".
Answer:
Step-by-step explanation:
Z -2.02
x 10
µ 22.5
σ 6.2