Sunday

November 23, 2014

November 23, 2014

Posted by **Zach** on Tuesday, May 4, 2010 at 11:57pm.

thanks

~zach

- Math -
**Reiny**, Wednesday, May 5, 2010 at 7:20amAt the start we had >64(400) kg of alcohol

100 kg were removed,

so we had .64(300) left, adding 100 kg of water does not change that, so

after 1st step, alcohol left is .64(300) of the 400 kg

in the 2nd step the same argument can be applied

so the amount of alcohol left is .64(.64(300))

after the 3rd step, amount left is .64(.64(.64(300)))

= 300(.64)^3 = 78.64 kg

so the percentage of the tank that is alcohol is 78.64/400 = 19.66%

- Math -
**Zach**, Wednesday, May 5, 2010 at 10:08pmThank you

**Answer this Question**

**Related Questions**

Math please - A 75% alcohol concentration mixture of water and alcohol was made ...

algebra - A certain car's cooling system has an 8-qt capacity and is filled with...

Math - 180 ml of a mixture of water and alcohol with 90% alcohol concentration ...

chemistry - You need 715 mL of a 45% alcohol solution. On hand, you have a 55% ...

math - a mixture of alcohol and water is 35% acid. if the mixture contains a ...

algebra - a mixture of alcohol and water is 35% acid. if the mixture contains a ...

physics - the mass density of a mixture of ethyl alcohol and water is 950kg/m^3...

Math - Beginning with a tank containing 8075 gallons of gasoline, more gas is ...

chemistry - If 59.4 pounds of alcohol are mixed with 28.3 pounds of water, what...

math - A tank contains 50 gallons of a solution composed of 90% water and 10% ...