SOLUTION: A crop dusting service needs to prepare a 0.8% pesticide solution. It has an airplane with a 300-gal tank that contains 100 gal of a 0.5% solution. How much of a previously mixed 1

Question 1041595: A crop dusting service needs to prepare a 0.8% pesticide solution. It has an airplane with a 300-gal tank that contains 100 gal of a 0.5% solution. How much of a previously mixed 1% pesticide solution should be added to the tank to increase the concentration to the desired 0.8%?
Found 2 solutions by josgarithmetic, josmiceli:
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
The all-too-common two-part mixture problem.

two part mixture problem using just one variable - video example

any two-part mixture to find quantity of both parts

Mixture: Two-Part, price or cost, both material amounts unknown
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = gallons of 1% solution needed
gallons of pure pesticide initially
in the 300 gallon tank
----------------------------

--------------
150 gallons of 1% solution needs to be added
check:

OK
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