Questions on Word Problems: Mixtures answered by real tutors!

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Question 315318: A contractor estimated that 30 ft^3 of cement is required to make a concrete floor that measure 90 ft^2. Using this estimate, how much cement is required to make a concrete floor that measures 120ft^2?
Click here to see answer by rfer(16322)

Question 315380: a chemist has 600 ml of a solution that is half acid. she needs 70% oof acid. how much acid should she add?
Click here to see answer by josmiceli(19441)

Question 315741: A contractor estimated that 30 ft^3 of cement is required to make a concrete floor that measure 90 ft^2. Using this estimate, how much cement is required to make a concrete floor that measures 120ft^2?
Click here to see answer by checkley77(12844)

Question 315802: How many liters of a 30% acid solution should be mixed with 5 liters of a 21% acid solution to produce a 27% solution?
Click here to see answer by checkley77(12844)

Question 315808: a photogapher wishes to mix 16liters of a 7% acetic solution with a 12% solution to get a 9% solution. how much of 12% solution must be added
Click here to see answer by mananth(16946)

Question 315931: how many liters of a 30% acid solution should be mixed with 5 liters of a 21% acid solution to produce a 27% solution?

HELP! I can't wrap my head around this one!
Click here to see answer by Alan3354(69443)

Question 316001: twenty pounds of salt-water solution contains fifteen percent salt. How much water must be added to weaken the solution to twelve percent salt?
Click here to see answer by nerdybill(7384)

Question 316085: 1-HOW MUCH 5% ALCOHOL MUST BE MIXED WITH 10% ALCOHOL TO GET 2000ml OF 6% ALCOHOL?
2- HOW MUCH PURE ACID MUST BE MIXED WITH 50 LITERS OF 20% ACID TO GET 30% ACID?
Click here to see answer by josmiceli(19441)

Question 316114: a pharmacist has 20 L of a 10% drug solution. How many liters of 5% solution must be added to get a mixture that is 8% ?

Click here to see answer by nerdybill(7384)

Question 316247: How much antifreeze should be added to 6L of antifreeze to make a solution that is 70% anitfreeze?
Click here to see answer by Fombitz(32388)

Question 316205: Maple syrup worth $6.00 a gallon and corn syrup worth .80 cents a gallon are used to make a mixture worth $2.36 a gallon. How many gallons of each kind of syrup are need to make 50 gallons of the mixture?
Click here to see answer by Fombitz(32388)

Question 316288: A merchant sells cashews for 30,000 TL kilogram and Brazil nuts for 45,000 TL per kilogram. He wants to mix the nuts to get 20 kg of a mixture worth 36,000 TL kilogram. How many kilogram of each kind of nut does he need?
Click here to see answer by Edwin McCravy(20055)

Question 316452: How many gallons of a 25% alcohol solution would need to be mixed with a 35% alcohol solution in order to obtain 20 gallons of a 32% alcohol solutio?
Click here to see answer by Fombitz(32388)

Question 316589: How much water should be added to 6L of antifreeze to make a solution that is 70% antifreeze?
Click here to see answer by nerdybill(7384)

Question 316459: A scale on a map states that every 1/4 of an inch represents 20 miles. if two cities are 3 1/2 inches apart, how many miles are actually between the two cities?
Click here to see answer by checkley77(12844)

Question 316457: A discount store takes 50% off of the retail price of a desk. Fo the store's holiday sale, it takes an additional 20% off of all furniture.The desk's retail price was $320. How much is th desk on sle for during the holiday sale?
Click here to see answer by rfer(16322)

Question 316935: if a basketball team played 64 games and won 34 more games than loss answer is 15 and 49 how do we get this

Click here to see answer by tinbar(133)

Question 316935: if a basketball team played 64 games and won 34 more games than loss answer is 15 and 49 how do we get this

Click here to see answer by Fombitz(32388)

Question 316843: The EdHelper dairy farm needs to create a mix of 1,438 liters of milk, which contains 13.89% butterfat. The farm will use milk from Jason's farm, which contains 8% butterfat and milk from Dylan's farm, which contains 15% butterfat. How many liters of milk should the dairy purchase from Dylan's farm?
Click here to see answer by ankor@dixie-net.com(22740)

Question 317108: twelve millimeters of alcohol are mixed with 4.5 liters of water. How many millimeters are there in the mixture?

Click here to see answer by Fombitz(32388)

Question 317232: john drove 364 miles using 16 gallons of gas,at this rate how many miles would he drive using 18 gallons of gas?
Click here to see answer by Jstrasner(112)

Question 317102: it is neccessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 40 liters of 20% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strenght

Click here to see answer by ankor@dixie-net.com(22740)

Question 317284: We have sugar and wheat as the two basic ingredients to bake two items. a loaf of bread and a muffin. we have 25lbs of wheat and 5 lbs sugar. To bake each loaf of bread it takes 1.3 lbs of wheat and .05 lbs of sugar. To bake each muffin it takes 0.4 lbs of wheat and 0.16lbs of sugar.How many loaves of bread and how many muffins can you make?
Click here to see answer by solver91311(24713)

Question 317380: $7500 is in two savings accounts. one account earns 4% interest per year, the other earns 2.5% per year. total earned interest after one year is $132.50, how much was deposited in each account?
Click here to see answer by nyc_function(2741)

Question 317379: mix a solution that is 50% acid with a solution that is 100% water to make 4 liters of a solution that is 10% acid. How much of each solution is used?
This is what I have (4-x)*(50/100) = 4x*10/100
50(4-x) = 40
200-50x = 40
200(-200)-50X = 40-200
-50x = -160
-50x = -160
50 50
x = -3.2
So -3.2 liters of water with 0.8 liters of 50% solution to get 4 liters with a 10% percent solution of acid.
I'm not sure if this is right. I have been working on it for so long I keep making stupid mistakes.
Click here to see answer by nyc_function(2741)

Question 317183: Tickets for a school play sold for $2.50 for each adult and $1.00 for each child. The total receipts for 113 tickets sold were $221. Find the number of adult tickets sold.
Click here to see answer by Fombitz(32388)

Question 317959: How much of an alloy that is 30% copper should be mixed with 600oz of an alloy that is 60% copper in order to get alloy that is 40% copper?
I want to know if I set it up right.
.30x + .60(600) = .40(360+x)
Is that correct? ...because I'm not getting the answer I was told I should get.
Click here to see answer by Alan3354(69443)

Question 318061: Find the center and radius of the circle. (x - 1)2 + y2 = 36
A) (0, 1); 6
B) ( 1, 0); 36
C) ( 1, 0); 6
D) ( -1, 0); 6
Thanks
Click here to see answer by Edwin McCravy(20055)

Question 318275: if you have 40 gallons of an antifreeze solution at 80% antifreeze how much water do you need to make it 50%
Click here to see answer by Fombitz(32388)

Question 318276: Annika can do the weekly billing in 2h. Asa can do it in 3h. If Annika works for 30 min and is them joined by Asa, how long will it take them to finish?
Click here to see answer by solver91311(24713)

Question 318274: How many kilograms of water must be evaporated from 8 kg of a 25% salt solution to produce a 40% salt solution?
Click here to see answer by scott8148(6628)

Question 318417: How many litres of 12% sodium hypochlorite solution are needed to make 100 litres of 2% sodium hypochlorite solution?
Click here to see answer by mananth(16946)

Question 318464: A vessel is full of mixture of spirirt and water in which there is 18% spirit. 8 litres are drawn off and the vessel is filled up with water. If the spirit is now 15%, find the quantity in the vessel.
Click here to see answer by mananth(16946)

Question 318600: Hi, I am taking college algebra and need help with this word problem to turn in tomorrow.
Bottle 1 is 60% alcohol and 6 liters, and Bottle 2 is 10% alcohol. We want to mix them to form a new bottle which is 30% alcohol. Find the volumes that we need from Bottle 1 and Bottle 2 and also find the volume of the new bottle.
Thank you so much.
Click here to see answer by Fombitz(32388)

Question 318823: Michael invested a total of $14,000 in two certificates of deposit. One pays 5% interest, and the other pays 6% interest. His total interest at the end of one year is $780. How much is invested in the CD that pays 5% interest?
Click here to see answer by Fombitz(32388)

Question 318961: how many gallons of a 60% antifreeze solution must be mixed with 90 gallons of 20% anitfreeze to get a mixture that is 50% antifreeze?
Click here to see answer by Fombitz(32388)

Question 319173: if i have 20 ounces of a 20% salt solutions, how much salt do i add to make it a 25% solution
Click here to see answer by nyc_function(2741)

Question 319262: A chemist has 100 cc of 20% acid, the rest being water. She adds pure acid to make the solution 33 1/3% acid. How many ccs of water must she then add to return it to 20% acid?
Click here to see answer by stanbon(75887)

Question 319752: I have tried to solve to AW=L and so on... the answer is 150L but I cant figure out the formula. The question is "How many liters of a 20% alcohol solution should Maria mix with 50 liters of a 60% alcohol solution to obtain a 30% solution?" the answer is 150L of the 20% solution. I think I'm doing too much. Ive figured out the following...

If L = Liters
LA = Liters of Alcohol
LW = Liters of Whatever
the 50 liter mix of the 60% solution = .012 to 1
if 60% of the solution = LA
then 40% = LW.
so(0.012LA)(50L)=0.6LA+0.4LW x 50= 50L?
20% of 1L = 0.2LA with 0.80LW
I still dont understand where I'm going wrong... my assignment is due Tuesday... wow, I'm super confused. Please help me!

Click here to see answer by Alan3354(69443)

Question 319767: how much salt must be added to 800 grams of a solution that is 15% to obtian a solution that is 20% salt?
Click here to see answer by mananth(16946)

Question 319869: soybean meal is 14% protein, corn meal is 7% protein, How many pounds of each ahould be mixed together in order to get 280lb mixture with 10% protein.

I have went through a million of these examples in my math lab with no luck can you please help me??
Click here to see answer by rfer(16322)

Question 320389: 6 men take 4 days to complete a part of a job. how many days will it take 8 men to do the same piece of work?
Click here to see answer by ankor@dixie-net.com(22740)

Question 320654: how much liter of alcohol is added to a 4-liter 50% solution to make 70% solution?
Click here to see answer by mananth(16946)

Question 320660: A sum of $3248 is to be divided between two people in the ratio of 5 to 3. How much does each person receive?
I tried
3248* .60 = 1847 one person 1401 other person
I divided 5/3 to get ration % if 60 and other percent is 40 to create 100%
Thank you for your help.
Click here to see answer by gencore(1)

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