Total = 36oz
Amount of 18% solution = x
Amount of 9% solution = 36 - x
Using the fact that (amount of solution) * (percent HCl) = amount HCl we can set up an expression for the amount HCl in a mixture of 18% and 9% solutions with a total volume of 36oz.
Amount of HCl = x*0.18 + (36 - x)*0.09
If we divide this by the amount of solution we get percent HCl, and we have a target of 10% HCl. Now we have an equation to solve,
[x*0.18 + (36 - x)*0.09]/36 = 0.1
x*0.09 + 3.24 = 3.6
.09x = 0.36
x = 4
Therefore,
4 ounces of 18% HCl solution and 32 ounces of 9% HCl solution
Check:
[(4*.18) + (.09*32)]/36 = 0.1?
0.1 = 0.1 Yes.
Answer:
Number of one-dollar bills each child gets: 12 dollars
Dollars left over: 1 dollar
Step-by-step explanation:
25/2=12.5
so round down to 12 cause 13(2) is 26 and you only have 25.
so 12(2)=24.
Each kid will get 12 dollars and there will be 1 dollar left over.
Add 2.38 and 4.89 then subtract 3 giving you 4.27
I think the answer is b bc you do 18.15 * 30 then subtract all the taxes
