SOLUTION: According to a magazine, a cleaning solution of 5% bleach will remove mildew from a shower or tub. How many ounces of bleach do you need to make a quart of 5% bleach solution?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: According to a magazine, a cleaning solution of 5% bleach will remove mildew from a shower or tub. How many ounces of bleach do you need to make a quart of 5% bleach solution?       Log On


   

Question 1144259: According to a magazine, a cleaning solution of 5% bleach will remove mildew from a shower or tub.
How many ounces of bleach do you need to make a quart of 5% bleach solution?
Explain the method you used using complete sentences.
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Depends the concentration of bleach available. Is 12.5% available? Is it 10% to start with?

Taking x parts of 12.5% by volume
then 1-x p parts by volume of just water

12.5x%2B0=5%281-x%29
-
12.5x=5-5x
7.5x=5
x=2%2F3

Mix enough water with 2%2F3 quarts of 12.5% bleach to make 1 quart of finished solution. (About 1%2F3 quart of water).

Answer by ikleyn(52805) About Me  (Show Source):
You can put this solution on YOUR website!
.

I think that as a Math problem for school students,  it has a few sense  (if any . . . ),

since school students don't know what a chemical substance the  "pure bleach"  is.


Especially,  this phrase of the post 

    Explain the method you used using complete sentences.

makes me laughing since the meaning of the question itself is not clear  (is dark . . . ).


Who is the author of this masterpiece ?


            May I ask you  NEVER  POST  to this forum  "Math problems"  that you create on your own ?


Thank you very much and have a nice day.