Ahealth clinic uses a solution of bleach to sterilize petri dishes in which cultures are grown. the sterilization tank contains 60 gal of a solution of 4% ordinary household bleach mixed with pure distilled water. new research indicates that the concentration of bleach should be 6% for complete sterilization. how much of the solution should be drained and replaced with bleach to increase the bleach content to the recommended level? 4.5425 x gal need ? read it talk to a tutor page 1 of 1 0 words english (us) e e. ' - - - + 288%

1.25 gal

Step-by-step explanation:

4% of 60 equals 2.4, that means the tank contains 2.4 gal of pure bleach.  

You want the tank to contain 3.6 gal of pure bleach because 6% of 60 equals 3.6.

Now suppose you drain x gallons of solution, so now you 60-x gal in the tank.

In order to know how much bleach the tank has now, cross multiply

60 gall --------------> 2.4 gal pure bleach

60-x ------------------> ?

so

Now, you want to add x gal of pure bleach to complete the solution extracted in such a way that the amount of pure bleach in the tank is now 3.6, so we get the linear equation

Multiply both sides by 60 to eliminate the denominator

c. 16 units

step-by-step explanation:

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