SOLUTION: A biologist has two brine solutions, one containing 3% salt and another containing 12% salt. How many milliliters of each solution should she mix to obtain 1 L of a solution that c

Question 517486: A biologist has two brine solutions, one containing 3% salt and another containing 12% salt. How many milliliters of each solution should she mix to obtain 1 L of a solution that contains 8.4% salt?

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A biologist has two brine solutions, one containing 3% salt and another containing 12% salt.
How many milliliters of each solution should she mix to obtain 1 L of a solution that contains 8.4% salt?
:
Let x = amt of 12% brine
the total is required to be 1 liter, therefore
(1-x) = amt of 3%
:
.12x + .03(1-x) = .084(1)
.12x + .03 - .03x = .084
.12x - .03x = .084 - .03
.09x = .054
x = .054/.09
x = .6 liters of 12%
then
1-.6 = .4 liters of 3%
RELATED QUESTIONS
A biologist has two brine solutions, one containing 7% salt and another containing 28%... (answered by richwmiller)

A biologist has two brine solutions, one containing 2% salt and another containing 8%... (answered by Alan3354)

Hello, I am stuck on a mixture word problem. We have to use 2 unknowns (i.e., Let x=___... (answered by scott8148)

A biologist has two brine solutions, one containing 5% salt and another containing 20%... (answered by stanbon)

Hi! A biologist has two brine solutions, one containing 1% salt and another containing (answered by jim_thompson5910,MathTherapy)

A biologist has two brine solutions, one containing 2% salt and another containing 8%... (answered by Theo,MathTherapy,josgarithmetic,greenestamps)

One brine solution contains 6% salt and another brine solution contains 2% salt. How... (answered by ankor@dixie-net.com)

A chemist has one solution that is 25% salt and 75% water and another solution that is... (answered by josmiceli)

A chemist has two salt solutions. One solution is 20% salt and the other if 50% salt. How (answered by checkley71)