You need one equation of this problem to balance the amount of a boric acid.
The amount of boric acid in 50% solution is expressed as 0.50*x
Next, the amount of water is taken from 25 liters and x (based on 50% solution), that is 25 - x. However, there is NO amount of BORIC ACID in water, and that is 0.
For the output solution, the amount of boric acid will be 0.10*2.5 = 2.5
Then, the balance equation is
0.50*x + 0*(25 - x) = 2.5
Solving for x,
0.50*x + 0 = 2.5
x = 2.5/0.5 = 5
Therefore the amount of liters in 50% solution is
5*0.50 = 2.5 liters
The amount of water is 25 - 5 = 20 liters
Answer:
$578.60
Step-by-step explanation:
This is because:
$231.55 x 12 = 2778.60
2778.60 - 2200 = $578.60
Answer: 7 bags of popcorn
Step-by-step explanation: In this problem, we know that Katie sold 35 bags of popcorn and she sold 5 times as many as Aaron.
We can find out how many bags of popcorn Aaron sold by dividing the number of bag of popcorn that Katie sold by 5.
35 ÷ 5 = 7
This means that Aaron sold 7 bags of popcorn for the fundraiser.
Answer:
75% (sorry if Im wrong)
Step-by-step explanation:
If your taking a 50% discount off the original number your left with half, correct. If you take another 50% of thats 25% of the original number. you took more than 50% off and less than 100%, so 75%.