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Question 767060: It is desired to draw off a part of 10 gallons of 30% solution of alcohol and to replace it by pure alcohol so as to produce a 50% solution. How many gallons should be drawn off?
Click here to see answer by ramkikk66(644)

Question 767199: a supplier of lawn products
Click here to see answer by Alan3354(69443)

Question 767263: one week marjorie spent 1/2 of her allowance on a music video ,1/4 of her allowance on a t shirt, and 1/8 oh er allowance on her bus fare she had 5 dollars left at the end of the week
how much was her allowance that week?
Click here to see answer by rfer(16322)

Question 767262: Cleaning solution was made by mixing 10qt. Of a 4% baking soda solution and 8qt. Of a 45% soap solution. Find the concentration of the cleaning solution.
Thanks
Frank
Click here to see answer by josgarithmetic(39617)

Question 767062: If 1/6 of a solution of alcohol is replaced by water alone, the resulting mixture becomes a 30% solution. What is the percentage of alcohol in the original solution?
Click here to see answer by lwsshak3(11628)

Question 767558: If a mixture is created by adding 2 ounces of chemicals to 100 gallons of water, how much chemicals would I put in 15 gallons of water?
Click here to see answer by josmiceli(19441)

Question 767681: in what ratio should water and pure milk be mixed to reduce the price of milk from Rs 24 per litre to Rs 22 per litre?
Click here to see answer by solver91311(24713)

Question 767813: I would like a formula that would give me the the percentage of acid in the final mixture when for example 6 oz of a concentrate that is 18% acid is mixed with 128 oz water.
Click here to see answer by josgarithmetic(39617)

Question 767964: If I mix 8oz per 50 gallons, how much would I mix for 1gallon?
Click here to see answer by RoRo Jaxson(21)

Question 768083: How do you find the square root of 4y^2 over x? I tried finding the square root of 4y^2 but then got stuck on the finding the square root of x.
Click here to see answer by algebrahouse.com(1659)

Question 768211: What is the strength of 85 mls of pure solution diluted to 600 mls of solution?
Click here to see answer by josmiceli(19441)

Question 768199: How many pounds of a $1.20 per pound nut mixture must be mixed with two pounds ofa 90 cents per pound mixture to produce a mixture that sells for $1.00 per pound?
A) 0.5
B) 1.0
C) 1.5
D) 2.0
E) 2.5
Click here to see answer by josgarithmetic(39617)

Question 768490: Hello. I work for a veterinarian that likes to mix solutions using injectable medications. He likes to make diluted solutions as he uses very small doses. I will give an example as I understand what he wants but cannot fully understand the mathematics behind making the solution.
I have a medication X that is concentrated at 25mg/ml.
I want to make up a solution to dilute this to 0.05mg/ml with a target volume of 4ml.
How much of medication X needs to be mixed with how much sterile saline (which will just dilute it, that's all) to make the total of 4ml.
It is the math to figure out how much of medication X that I need. Also, I cannot figure out if the target volume has any effect on the calculations.
Please help! I want to understand this!
Thank you.
Click here to see answer by Alan3354(69443)

Question 768499: A flask contains 500 ml of an 80% alcohol solution in water. How much of this solution must be drawn off and replaced by water to obtain a solution having a concentration of 25% alcohol?
what are the steps to solve this problem? i get confused when there are already situations where you have to replace and to draw off things in the problem. Thankyou :)
Click here to see answer by josgarithmetic(39617)

Question 768572: A large grain silo is to be constructed in the shape of a circular cylinder with a hemisphere attached to the top (see the figure). The diameter of the silo is to be 30 feet, but the height is yet to be determined. Find the height h of the silo that will result in a capacity of 13,725π ft3.
Click here to see answer by mananth(16946)

Question 768579: if a 25ml of a solution of 50% is used then how much amount of 30% of same solution must be used?

Click here to see answer by ramkikk66(644)

Question 768574: A salesperson purchased an automobile that was advertised as averaging 27 mi/gal in the city and 38 mi/gal on the highway. A recent sales trip that covered 1706 miles required 53 gallons of gasoline. Assuming that the advertised mileage estimates were correct, how many miles were driven in the city?
Click here to see answer by ramkikk66(644)

Question 768567: A pharmacist is to prepare 15 milliliters of special eye drops for a glaucoma patient. The eye-drop solution must have a 5% active ingredient, but the pharmacist only has 20% solution and 2% solution in stock. How much of each type of solution should be used to fill the prescription?
Click here to see answer by josmiceli(19441)

Question 768558: At 1 pm, Poseidon opened pipe A to fill an empty tank with water. Two hours later, Zeus opened pipe B which also fills the tank, but accidentally opened pipe X which drains the tank. At 4 pm, evil Hades closed both pipes A and B. With pipe X left open, the tank was completely drained at 6:45 pm. If pipe X alone can empty the full tank in 5 hours, while pipe B alone can fill up the empty tank in 4 hours, how long will it take pipe A alone to fill up the empty tank?
Click here to see answer by ankor@dixie-net.com(22740)

Question 768663: She needs to prepare 36oz of a 12% solution. Find the amount of 18% solution and the amount of 9% solution she should mix to get this solution.
Click here to see answer by ankor@dixie-net.com(22740)

Question 768987: How much water must be added to 30oz of a 80% solution to change it to a 60% solution?
Click here to see answer by lwsshak3(11628)

Question 769042: I would like to dilute 3 litres of 30% salt solution to 20% thank you. Jan
Click here to see answer by lwsshak3(11628)

Question 769164: the attendance at a moving picture theater on a certain day was 737 person.If there were 289 more adults than children ,How many children were there?

Click here to see answer by knighty2002uk(39)

Question 769238: if a tank holds 100 gallons with a mix of 60% water and 40% oil, how many gallons of oil does the tank contain ?
Click here to see answer by stanbon(75887)

Question 769326: Alloy A is composed of 3 parts gold and 1 part silver. Alloy B is composed 1 part gold and 3 part silver . When combined the alloy mixture has 15 g of gold and 9 g of silver. How many grams does each alloy weight?
Click here to see answer by josmiceli(19441)

Question 769271: how much 20% acid must be mixed with 5% acid to make 30mL of 12% acid?
Click here to see answer by josgarithmetic(39617)

Question 769376: a famer has $100 doallrs to spend on 100 animals.
he has to end up with 100 animals.
pigs cost $10 each, turkeys cost .50cents and chickens cost 12.5cents
how many of each can he have for his $100?
Click here to see answer by KMST(5328)

Question 769508: Pure acid is to be added to a 100% acid solution to obtain 90L of 23% solution. What amounts are needed of each.
Click here to see answer by Alan3354(69443)

Question 769533: a paint formula requires 2 oz of dye for every 15 oz of base paint. how many ounces of dye are required for 120 oz of base paint.
Click here to see answer by josgarithmetic(39617)

Question 769182: a solution of 16 pints of salt and water is 25% salt. how much water must be added to produce a solution which is 20% salt?
Click here to see answer by josgarithmetic(39617)

Question 769664: If something uses 2.5 mL per 5 gallons how many milliliters would be in 2 gallons
Thank you
Click here to see answer by knighty2002uk(39)

Question 769832: How many gallons of a 13%-salt solution must be mixed with 6 gallons of a 24%-salt solution to obtain a 16%-salt solution?
Click here to see answer by stanbon(75887)

Question 769844: I need help with this word problem : A chemist wants to mix a new solution with at least 18% pure salt. The chemist has two solutions with 9% pure salt and 24% and wants to make at most 250 mL of the new solution. Write and graph a system of inequalities that can be used to find the amount of each solution needed?
Click here to see answer by josgarithmetic(39617)

Question 770122: find the distance between p1 and p2
p1=(5,-2)
p2=(4,5)
Click here to see answer by stanbon(75887)

Question 770128: FIND THE MIDPOINT
p1=(5,5)
p2=(-2,6)
Click here to see answer by stanbon(75887)

Question 770241: can you help me with this question :
A merchant has some coffee worth 80 cents and some worth 90 cents per pound. How many pounds of each should he use to make 100 pounds of a mixture worth 88 cents per pound?
Click here to see answer by mananth(16946)

Question 770408: Help me please!
Gabe Amodeo, a nuclear physicist needs 30 liters of a 40% acid solution. He currently has a 30% solution, and a 60% solution. How many liters of each does he need to make the needed 30 liters of 40% acid solution?
Gabe needs __ liters of the 30% solution.
He also needs ___ liters of the 60% solution.
Click here to see answer by josmiceli(19441)

Question 770442: If 11% of the 240 million adult Americans live in poverty, how many adult Americans live in poverty?
___ million adult Americans
Click here to see answer by lenny460(1073)

Question 770456: In the lab, Justin has two solutions that contain alcohol and is mixing them with each other. He uses 3 times as much Solution A as Solution B. Solution A is 17% alcohol and Solution B 14% is alcohol. How many milliliters of Solution B does he use, if the resulting mixture has 195 milliliters of pure alcohol?
Click here to see answer by josmiceli(19441)

Question 770507: if i need to mix 5 mls per every 4 litres
how many mls would i mix for a 5 gallon bucket

Click here to see answer by stanbon(75887)

Question 770526: In a certain medical test designed to measure carbohydrate tolerance, an adult drinks 3 ounces of a 20% glucose solution. When the test is administered to a child, the glucose concentration must be decreased to 10%. How much 20% glucose solution and how much water should be used to prepare 3 ounces of 10% glucose solution?
Click here to see answer by josgarithmetic(39617)

Question 770581: A certain mixture is made by mixing two ingredients in the ratio 7 to 3. If it is required to make 40 pounds of mixture, how much of each ingredient will be needed.

Click here to see answer by josgarithmetic(39617)

Question 770663: A jug is 3/5 full of water. If 100ml is added to the jug it is 2/3 full. How many litres does the jug hold when full?
In making one revolution a bike wheel travels 1.8m. If the bike is travelling at 24 km/h, how fast is the wheel turning in revolutions per min?
A river flows at 3km/h. A canoeist travelling at 12km/h paddles upstream for 3.5 hours. What distance does the canoeist travel in that time?
Click here to see answer by josgarithmetic(39617)

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