An orchard operator must dilut 11 quarts of a 60% insecticide solution by adding water. How many quarts of water should be added to get a mixture that is 2% insecticide?

Question

An orchard operator must dilut 11 quarts of a 60% insecticide solution by adding water.  How many quarts of water should be added to get a mixture that is 2% insecticide?

amistre64 · Answer

11(.60-.02)/(1-.60) i think ... might wanna dbl check it tho

amistre64 · Answer

might be 1-.02 tho

anonymous · Answer

the answer is suppose to be 319  quarts but I cant figure it out

amistre64 · Answer

w + 11(.6) = (w+11)(.02)

w+6.6 = w.02 + 2.2

4.4 = w(.02 - 1)

4.4/(.98) = w maybe?

anonymous · Answer

i dont think thats how

amistre64 · Answer

it aint, i messed it up someplace :)

amistre64 · Answer

w+11 = total quarts

w(1) + 11(.60) = (w+11)(.02)  should be what they are asking right?

amistre64 · Answer

should the water have a concentration of 1 or 0?

anonymous · Answer

it does not say, it only gives me the answere 319 quarts

amistre64 · Answer

319 if water is 0 concentration

amistre64 · Answer

w+11 = total quarts

w(0) + 11(.60) = (w+11)(.02)

6.6 = w.02 + .22

6.6 - .22 = w.02

w = 6.38/.02 = 638/2 = 319