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Question 899683: A chemist has 50ml of a solution with 20% concentration of acid. How many ml of pure acid must be added to increase the concentration to 30%?
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Question 899737: How many quarts of 12% antifreeze and 25% antifreeze should be mixed to obtain 20 quarts of 15% antifreeze?
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Question 899728: What quantity of pure acid must be added to 400 mL of a 50% acid solution to produce a 60% acid solution?
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Question 899893: Five times the first of the three consecutive even integers is 4 less than twice the sum of the second and third. Find the integers
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Question 899896: A regulation requires that in order for a soda to be termed as a "naturally flavored," the drink must contain at least 10% fruit juice. How much pure juice must a manufacturer add to 900 gallons of orange soda to conform to the regulation?
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Question 899808: Question1524: Forty liters of a 60% salt solution are reduced to a 45% solution. How much solution must be drained off and replaced with distilled water so that the resulting solution contains only 45% solution.
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Question 900041: How many mL of a 60% acid solution must be mixed with a 20% acid solution to produce 200 mL of a 50% acid solution?
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Question 900021: How many gallons of 15% alcohol solution and 45% alcohol solution must be mixed to get 12 gallons of 25% alcohol solution?
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Question 900087: Mixing equal parts of 5% (acidic)vinegar with 20% (acidic)vinegar will produce WHAT __% (acidic) vinegar?
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Question 900087: Mixing equal parts of 5% (acidic)vinegar with 20% (acidic)vinegar will produce WHAT __% (acidic) vinegar?
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Question 900095: How many liters of pure water should be mixed with an 8-L solution of 60% acid to produce a mixture that is 50% water?
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Question 900095: How many liters of pure water should be mixed with an 8-L solution of 60% acid to produce a mixture that is 50% water?
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Question 899726: How much 2% acid must be added to 12% acid to get 50 ml of 10% acid?

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Question 899916: Find the cost per ounce of a sunscreen made from 150 oz of lotion that cost $3.44 per ounce and 80 oz of lotion that cost $11.49 per ounce.
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Question 899562: Jordan and Manuel are on the track-and-field team at school. Running around the track one day, Jordan ran 444 m and Manuel ran 777 m. They both ran an even number of times around the track. How far around is the track?
By the way, this is about the GCF and the LCM, Common Factor and the Common Multiple.
Please explain well, and please let me know soon. :)
Thanks
~Jess♥
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Question 900149: A nurse mixes 60 cc of a 50% saline solution with a 10% saline solution to produce a 25% saline solution. How much of the 10% solution should he use?
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Question 900083: A rollover ira of $18050 was invested in two mutual funds one earning 12% interest and the other earning 10%. After 1 year the combined interest income is $2037. How much was invested at each rate?
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Question 900155: A 25 ounce solution is 20 percent alcohol. If 50 ounces of water are alcohol to it, what percent of the new solution is alcohol?'
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Question 900176: A pound of tin is worth $2 more than a pound of copper. Four pounds of tin are mixed with 6 pounds of copper to make bronze that sells for $3.55 per pound. How much is a pound of tin worth?
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Question 900208: A�chemist�has�two�prepared�acid�solutions,
one�of�which�is�2%�acid�by�volume,
another�7%�acid.��How�many�cubic�centimeters
of�each��should�the�chemist�mix�together�to
�obtain�40�cm3
�of�a�3.2%�acid�solution?
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Question 900195: Antifreeze is a compound added to water to reduce the freezing point of a mixture. In extreme cold (less than −35�F), one car manufacturer recommends that a mixture of 65% antifreeze be used. How much 50% antifreeze solution should be drained from a 4-gal tank and replaced with pure antifreeze to produce a 65% antifreeze mixture?
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Question 900369: Milton needs 45 liters of 20% alcohol solution. He only has 15% alcohol solution and 30% alcohol solution. How many liters of each should he combine to make the mixture he needs?
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Question 900374: There were 411 tickets sold for a soccer game, some for students and some for non-students. Student tickets cost $4.25 each and non-students tickets cost $8.50 each. The total receipts were $3021.75. How many of each type were sold?
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Question 900375: A motorboat traveling with the current went 72 miles in 3 hours. Against the current, the boat could only go 48 miles in the same amount of time. Find the rate of the boat in still water if the rate of the current is 4 miles per hour.
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Question 900373: How many liters of a 50% acid solution must be mixed with a 20% acid solution to get 240 L of a 40% acid solution.
How many liters of a 50% acid solution must be used?
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Question 900364: A container holds a mixture of 37 peanuts, 14 cashews, and 25 pecans. How many nuts must you take out to be sure of getting at least two of a kind? At least three of a kind?
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Question 900309: A metalworker has a metal alloy that is 30% copper and another that is 70% copper how many kilograms of each alloy should the metalworker combine to create 50kg of a 62% copper alloy?
thanks for the help
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Question 898448: Raeann deposited $8000 into three accounts at her credit union: a checking account that pays 1.2% interest, a savings account that pays 2.5% interest, and a money market account that pays 3% interest. If she put three times more money in the 3% account than she did in the 1.2% account, and her total interest for 1 year was $202, how much did she deposit into each account?
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Question 898800: Wendy was awarded a volleyball scholarship to the University of Michigan, so on graduation her parents gave her the dollar-sign 16,000 they had saved for her college tuition. She opted to invest some money in a privately held company that pays 10 % per year and evenly split the remaining money between a money market account yielding 2 % and a high-risk stock that yielded 40 %. At the end of the first year she had dollar-sign 19,140 total. How much did she invest in each of the three?
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Question 896971: 80 ml of medicine was made from a mix of three parts water to one part solution. How much solution was used?
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Question 899032: You sold 52 items and have an income of 2475. How many did you sell for each if the fries are sold for 40, spaghetti for 35, chicken for 60 and you sold 7 more chicken than spaghetti?
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Question 900408: A coffee has two types of coffee beans. Blend A is sold for $2.35/pound and blend B is sold for $3.25/pound. How many pounds of blend A must be added to 10 pounds of blend B to create a mixture that the coffee can sell for $2.65/pound?
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Question 896461: how much water must be evaporated from brine (l0 liters)with 25% salt and replaced by 2 liters of salt to obtain 22% mixture of salt?
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Question 900545: A chemist wants 70% of saline solution with 8 liters of 25% saline solution to create a solution that is 40% salt. How many liters of 70% saline solution does she need?
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Question 900550: A grocery store sells a mixture of peanuts and raisins for $1.75 per pound. Peanuts cost $1.25 per pound and raisins cost $2.75 per pound. How many pounds of raisins are needed to mix with four pounds of peanuts?
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Question 900555: The Thomas' left for vacation traveling north at an average rate of 65 miles per hour. Two hours after the Thomas' departed the Dialas set out to catch them. If the Dialas travel at a rate of 75 miles per hour how long will it take them to overtake the Thomas'.
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Question 895711: How much water should be added to 8ml of 6% saline solution to reduce the concentration to 4% saline
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Question 900583: A butcher has some hamburger that is 24% fat and some that is 21% fat. How many pounds of each should be mixed to make 87 lb of hamburger that is 22% fat?
How do I set this up?
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Question 898801: A bag of peanuts is worth $0.20 less than a bag of cashews. Equal amounts of peanuts and cashews are used to make 40 bags of a mixture that sells for $1.15 per bag. How much is a bag of cashews worth
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Question 900616: How much of a 40% alcohol solution must be mixed with 50 gallons of an 18% alcohol solution to obtain a solution that is 30% alcohol?
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Question 900685: The cooling system of a car has a capacity of 25 liters. If the system is currently filled with a mixture that is 60% antifreeze, how much of this mixture should be drained and replaced with pure antifreeze so that the system is filled with a solution that is 90% antifreeze?
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Question 900614: a procedure calls for acetic acid and water, with the proportions being one part acetic acid to three parts water. one hundred milliliters are needed. how much acetic acid and water are required? what dilution is made?
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Question 897964: A ferry leaves a harbor and travels to a resort island at an average speed of 18 mph. On the return trip, because of fog, the ferry travels at an average speed of 12 mph. The total time for the trip is 5 h. How far is the island from the harbor?
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245