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Question 425150: How many quarts of a 50% acid solution must be added to 20 quarts of a 20% acid solution to obtain a 40% acid solution?
Click here to see answer by jorel1380(3719)

Question 424875: A manager of a candy shop sells chocolate peanuts for $9 per pound and chocolate covered cashews for $15 per pound. The manager wishes to mix 50 pounds of cashews to get a cashew-peanut mixture that sell for 9.50 per pound. How many pounds of chocolate covered peanuts should be used?
Click here to see answer by jorel1380(3719)

Question 425348: If 4 gallons of alcohol is added to 2 gallons of a 15% alcohol solution, what percentage of alcohol is in the mixture?
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Question 424551: To the nearest mL, how much 0.1% ampicillin in solution do you have to add to 40 mL of 0.5% ampicillin in solution to have 0.4 mL ampicillin total?
Click here to see answer by jorel1380(3719)

Question 424536: A chemist needs to produce a 40% acid mixture. She has 25% strength solution and 80% strength solution on hand.
Rouding to the nearest thousandth (3 decimal places; nearest mL), how much 25% solution does she add to create 1 liter of the 40% strength mixture?
Click here to see answer by jorel1380(3719)

Question 424531: A chemist needs to produce a 40% acid mixture. She has 25% strength solution and 80% strength solution on hand.
Rouding to the nearest thousandth (3 decimal places; nearest mL), how much 25% solution does she add to create 1 liter of the 40% strength mixture?
Click here to see answer by jorel1380(3719)

Question 424443: A chemist mixes distilled water with a 90 % solution of sulfuric acid to produce a 50% solution. If 5 liters of distilled water are used, how much 50% solution is produced?
Click here to see answer by jorel1380(3719)

Question 424439: How many gallons of distilled water must be mixed with 50 gallons of 40% alcohol solution to obtain a 30% solution?
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Question 464795: 40% of students are boys
30% of students are blond
there are 3 times as many blond girls as blond boys
what is the percentage of boys who are blond
Click here to see answer by amoresroy(361)

Question 464862: 11. Given A = {1, 2, 3}, B = {3, 4, 5, 6,}, and C = {3, 5, 7}. Evaluate each set
a) A ∩ B
b) A U C
c) B U C
d) (A U B) ∩ C
e) A U (B U C)
f) (A ∩ B) ∩ C
g) (A ∩ B) U C (Points : 7)
Click here to see answer by richard1234(7193)

Question 464865: A survey of flower gardeners showed the following:

45 grew roses 7 grew both roses and tulips 4 grew all three types
16 grew tulips 5 grew both orchids and tulips 9 grew none of these three
13 grew orchids 10 grew both roses and orchids

Create a Venn diagram to reflect the above data, label your diagram clearly and submit to the Dropbox. Use your diagram to answer the following questions here.

(a) How many grew only roses?
(b) How many grew both roses and tulips, but not orchids?
(c) How many grew only tulips?
(d) How many grew none of these three or only orchids?
(e) How many flower gardeners were surveyed?
Click here to see answer by josmiceli(19441)

Question 461704: A solution of 53% pesticide is to be mixed with a solution of 21% pesticide to form 128 liters of a 40% solution. How many liters of the 53% solution must be used?
Click here to see answer by jorel1380(3719)

Question 463459: I am having trouble with setting up this problem
How much NaCl would you need to add to 2 liters of water to make saline? (Normal Saline is 0.9% w/v NaCl)
Click here to see answer by jorel1380(3719)

Question 461721: a letter is drawn at random from the letters, A,B,C,D,E, and F. What is the probability that the letter is a vowel?
Click here to see answer by jorel1380(3719)

Question 463747: I would like to figure out how to mix pesticide at various concentrations for my garden. The chemical concentration is 10%. If I mix x amount in one gallon, what will my concentration be? ex: 1 oz of concentrate, in one gallon (128 oz)= what percentage of pesticide? I would like the formula for figuring this problem out please. Thanks for your help. I used to be pretty good with math, but it's been so long since high school.
Click here to see answer by jorel1380(3719)

Question 463751: How many milligrams of pure water must be added to 6 mg of a 40% solution to obtain a 25% solution? Round to the nearest tenth.
Click here to see answer by jorel1380(3719)

Question 463754: One canned juice drink is 15% lemon juice; another is 5% lemon juice. How many liters of each should be mixed together in order to get 10L that is 10% lemon juice?
Click here to see answer by jorel1380(3719)

Question 464518: The owner of a health foods store sells raisins for $3.20 per pound and nuts for $2.40 per pound. He decides to mix the raisins and the nuts and sell the mixture for $2.72 per pound. To get 50 pounds of the mixture how many pounds of raisins and of nuts should he use?
Click here to see answer by jorel1380(3719)

Question 423009: A dairy farmer wants to mix a 85% protein supplement and a standard 10% protein ration to make 1000 pounds of a high-grade 70% protein ration. How many pounds of each should he use?
Click here to see answer by jorel1380(3719)

Question 422895: a merchant has coffee worth $5 a pound that she wishes to mix with 50 pounds of coffee worth $9 a pound to get a mixture worth $6 a pound. how many pounds of the $5 coffee be used?

Click here to see answer by jorel1380(3719)

Question 422809: 1. The cost of an adult ticket for a Saturday matinee at Turtle Cinema is $7. The cost of a student ticket is $5. For a particular Saturday matinee, the cinema sold 45 tickets and collected $265. How many student tickets were sold for the Saturday matinee?
2.What is the area of the quadrilateral with vertices at (1, 1), (4, 1), (7, 5) and (4, 5)?
Click here to see answer by jorel1380(3719)

Question 422623: To pay for their child�s college education, the parents invested $10,000 part in a certificate of deposit paying 8.5% annual interest, the rest un a mutual fund paying 7% annual interest. The annual income from the certificate of deposit is $200 more than the annual income from the mutual fund. How much money was put into each type of investment?
Click here to see answer by jorel1380(3719)

Question 423025: There are 90 ml of pure alcohol in a bottle of 750 ml of water and alcohol mixture .Find the amount of pure alcohol that must be added to obtain a new mixture that is 33% alcohol.
Click here to see answer by jorel1380(3719)

Question 423196: How much water must be added to 12L of a 40% solution of alcohol to obtain a 30% solution?
Click here to see answer by jorel1380(3719)

Question 465183: How many gallons of gasoline that is 6% ethanol must be added to 2,000 gallons of gasoline with no ethanol to get a mixture that is 4% ethanol
Click here to see answer by stanbon(75887)

Question 465805: Becca has $16.80 to spend on dinner. She wants to tip the waitress 20% of the cost of her meal. How much money can she spend on the meal itself?
Click here to see answer by Ryan O'Hara(46)

Question 465836: how many pounds of coffee worth 9 dollars a pound should be added to 30 pounds of coffee worth 3 dollars a pound to get a mixture worth 5 dollars a pound?
Click here to see answer by kingme18(98)

Question 465801: A watch is on sale for $90. This is a discount of 25% from the original price. What is the original price?
Click here to see answer by kingme18(98)

Question 423817: 10 Liters of a 20% acid solution are mixed with 30 Liters of a 30% acid solution. Which of the following is the concentration of acid in the final mixture?

Click here to see answer by jorel1380(3719)

Question 423547: how many liters of a 25% acid solution would we need to mix with 7 liters of 10% to produce 20% acid solution as a result?
Click here to see answer by jorel1380(3719)

Question 423388: A chemistry teacher needs to strengthen a 12% solution of acid to strength s by mixing it with pure acid. How much pure acid must be added to 100ml of the 12% solution to make acid strength s?

Click here to see answer by jorel1380(3719)

Question 465808: What percent of 6.4 is 0.24?
Click here to see answer by scott8148(6628)

Question 465899: JIM NEEDS TO PREPARE ONE LITER OF A 4% NACL SOLUTION. HOW MUCH NACL SHOULD HE WEIGH OUT?
Click here to see answer by jorel1380(3719)

Question 465899: JIM NEEDS TO PREPARE ONE LITER OF A 4% NACL SOLUTION. HOW MUCH NACL SHOULD HE WEIGH OUT?
Click here to see answer by richard1234(7193)

Question 424710: 14sqrt a ^(6)
Click here to see answer by jorel1380(3719)

Question 463865: C chemist has to mix two chemicals, A and B, to make 150 grams of a solution. This solution requires 10 grams of A or every gram of B. If the amount of chemical A is designated as x and the amount of Chemical B is designated y, which of the following pairs of equations will allow the chemist to determine how much of each chemical she will need.
1) x+y=150
x=10y
2) x+10y=150
y+10x=150
3) x+y=150
y=10x
Click here to see answer by jorel1380(3719)

Question 465300: I have to use two different types of milk (eg. Milk A & B)which have two different protein to fat ratios - in percents per 100 litre of milk.
In milk A, the protein to fat ratio is 3.22/ 3.85. = .836
In milk B, the protein to fat ratio is 5.18/ 2.67 = 1.94
What quantities of milk A and B should be used to get 7000 L of mix at a ratio of (protein/fat) = 1.01
If possible let me know the equation used for this
thanks
However I tried with the eqn
A+B = 7000, so A = 7000-B
A(.836) + B(1.94) = 7000(1.01)
I got the answer also but When I check their Quantities multiply with their Individual Protein and Fat ; then their ratios are not matching
e.g 5899 Qty of milk Fat (A) + 1101 Qty of milk Fat (B) when added up to Total fat and same way for Protein ....and now when we take protein/Fat then it shows diff ratio.....Can U explain this

Click here to see answer by jorel1380(3719)

Question 465869: A type of milk contains 8% water.What quantity of pure milk should be added to 20litres of this milk to reduce water to 5%?
Click here to see answer by robertb(5830)

Question 466074: two gallons of milk contains 2% butterfat. How many quarts of milk should be drained and replaced by pure butterfat to produce a mixture of 2 gallons of milk containing 5% butterfat?
Click here to see answer by jorel1380(3719)

Question 466081: How many gallons of pure alcohol should be mixed with 20 gallons of a 15 % alcohol solution to obtain a 25% alcohol mixture? It should be two equations that can then be solved using substitution or elimination
Click here to see answer by jorel1380(3719)

Question 422585: How much 58% antifreeze solution and 45% antifreeze solution should be combined to give 39 gallons of 54% antifreeze solution?
Click here to see answer by jorel1380(3719)

Question 422584: A mixture of 9% disinfectant solution is to be made from 12% and 7% disinfectant solutions. How much of each solution should be used if 35 gallons of 9% solution are needed?
Click here to see answer by jorel1380(3719)

Question 422563: How many gallons of 50% solution must be mixed with 100 Gallons of 20% solution of salt that is 40% salt
Click here to see answer by jorel1380(3719)

Question 422077: How many mililiters of 70% isopropyl alcohol should be mixed with 20 mililiters of water to make 50% isopropyl alcohol?
Click here to see answer by jorel1380(3719)

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