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Question 433771: If 9 iron bars 7ft. long, 3 inches wide, and 1.2 inches thick weigh 912 lbs., what will be the weight of 5 bars of the same material 10ft. long, 4 inches wide, and 2.3 inches thick?
Click here to see answer by jorel1380(3719)

Question 433821: Eugene wants to make a 14% sugar solution. He has already poured 9 fl. oz. of pure water into a beaker. How many fl. oz. of a 32% sugar solution must he add to this to create the desired mixture?
I have tried setting this up and I am having difficulties.
Thanks,
Tyler
Click here to see answer by jorel1380(3719)

Question 431443: how much water should be mixed with 6 gallons of 30% alcohol to get a 20% alcohol solution
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Question 431111: how many grams of alcohol must be added to 40 grams of a 15% alcohol solution to obtain a 20% alcohol solution
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Question 430678: The volume of a quantity of an ideal gas was held constant. The initial pressure and temperature were 8000 torr and 1500 kelvins. What is the final pressure if the temperature was raised to 3270 kelvins
Click here to see answer by jorel1380(3719)

Question 433829: How much clay do you need to add to 6 ft^3 of soil with 30% clay in order to make a soil with 72% clay?
I suck at setting problems up, but can solve them fine. Having troubles with this one.
Thanks,
Tyler
Click here to see answer by jorel1380(3719)

Question 430435: Gina has a pile of 50 dimes and nickels worth $4.30. How many coins of each type does she have?
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Question 430213: An herbalist has 30 oz of herbs costing @2/oz. How many oz of herbs consting $1/oz should be mixed with the 30oz to produce a mix costing $1.60/oz?
Thank you
Click here to see answer by jorel1380(3719)

Question 430516: A college student earned $9000 during summer vacation working as a waiter. the student invested part of the money @ 8% and the rest @ 7%. if the student recieved a total of %667 in interest at the end of the year, how much was invested @ 8% ?
Click here to see answer by jorel1380(3719)

Question 430118: an insurance company offers two health plan; Plan A requires you to pay the first $120 of bill, plus 30% of the rest. Plan B requires you to pay the first $200 of bill plus 25% of the rest.
For what amount of medical bills will Plan B save you money?
Click here to see answer by jorel1380(3719)

Question 429929: How many gallons of pure alcohol should be mixed with 20 gal of 15% alcohol solution to obtain a mixture that is 25% alcohol?
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Question 429932: A church building fund has invested some money in two ways: parts of the money at 4% interest and four times as much at 3.5%. Find the amount invested at each rate if the total annual income from interest is $3600.
Click here to see answer by jorel1380(3719)

Question 433832: 2 fl. oz. of a sugar solution was mixed with 3 fl. oz. of a 45% sugar solution to make a 63% sugar solution. Find the percent concentration of the first solution.
Please help.
Thanks,
Tyler
Click here to see answer by jorel1380(3719)

Question 429317: how many ounces of a 15% alcohol solution must be mixed with 3 ounces of a 20% solution to make a 18%alcohol solution
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Question 433834: 1 gallon of an alcohol solution was mixed with a 3 gallon of pure water to make a 7% alcohol solution. Find the perecent concentration of the first solution.
Please help.

Thanks,
Tyler
Click here to see answer by jorel1380(3719)

Question 434270: Together ,a skateboard and a bicycle cost $199.00 the skateboard costs $51.00 less than the bicycle.how much does each cost?
Click here to see answer by jorel1380(3719)

Question 446869: A jeweler needs to mix an alloy with a 16% gold content and an alloy with a 28% gold content to obtain 32 ounces of a new alloy with a 25% gold content. How many ounces of each of the original alloys must be used?
Click here to see answer by nerdybill(7384)

Question 447040: Can someone help me with this?
A tank can be filled in 15 hours by pipe A alone and in 30 hours by pipe B alone. How long will it take to fill the tank if both pipes are working?
Thanks
Click here to see answer by jorel1380(3719)

Question 447012: I have some 40% solution of alcohol and some pure alcohol. How much of each must I mix to get 60 ounces of a 50% solution?
Click here to see answer by jorel1380(3719)

Question 447144: Let the "kernel" of a number be defined as the square of its greatest prime factor. For instance,the "kernel" of 18 is 9, because the greatest prime factor of 18 is 3(prime factorization: 18=2*3*3), and =9.
What is "kernel" of 39?

Click here to see answer by tinbar(133)

Question 447245: 10 kg of copper were mixed with 5 kg of tin which costs $10/kg to make bronze which cost $8/kg. What is the price per kg of copper?
Click here to see answer by mananth(16946)

Question 447261: kelly is 1/3 the age of her father. in 12 years she will be half the age of her father. how old is each now?
Click here to see answer by jorel1380(3719)

Question 447419: Soy bean meals is 16% protein, cornmeal is 8% protein. Howe many pounds of each should be mixed together in order to get 320 lbs. mixture that is 12% protein?
Click here to see answer by mananth(16946)

Question 447422: Smokers lumber can convert logs into either lumber or plywood. In a given day the mill turns out three times as many units of plywood as lumber. It makes a profit of $25 on a unit of lumber and $40 on a unit of plywood. How many of each units must be produced and sold to make either a profit of $14,935?
Click here to see answer by rwm(914)

Question 447409: How many gallons of a 10% salt solution must be mixed with a 50 gallons of a 50% salt solution to obtain a 20% salt solution?
Click here to see answer by rwm(914)

Question 447363: In a chemistry class, 12L of a 12% alcohol solution must be mixed with a 20% solution to get a 14% solution. How many liters of the 20% solution are needed?
How do I set the problem up and solve?
I'm so confused and would appreciate any help. Thanks so much.
Click here to see answer by rwm(914)

Question 447420: A disc jockey must play 14 commercial spots during 1 hour of each radio shows. Each commercial is either 30 seconds or 60 seconds long. If the total commercial time during 1 hour is 11 minutes, how many 30 second commercials played that hour? How many 60 second commercials?
Click here to see answer by rwm(914)

Question 447267: Adam & his brother mixed together two types of soil to make 14m of soil with a 38% silt content. They used 4m of a soil with 28% silt content and 10m of another type of soil. What was the silt content of the second type of soil?
Click here to see answer by rwm(914)

Question 447214: how many liters of 45% acid solution must be mixed with 10 liters of 65% acid solution to get 45% acid solution
Click here to see answer by rwm(914)

Question 447594: Lou wants to make a coffee mixture to sell. He is going to mix Sumatra coffee which cost $2.50 per pound with Columbian coffee which costs $3.75 per pound. He wants to make 50 pounds of mix and he wants the cost of the mix to be $3.35 per pound. How many pound of each will he need?
Click here to see answer by katealdridge(100)

Question 447846: How many liters of 60% solution of sulfuric acid should be added to 10 liters of a 30% solution of sulfuric acid to obtain a 50% solution?
Click here to see answer by stanbon(75887)

Question 448038: If you have 14% milk fat ice cream base and 10% milk fat ice cream base, what combination amounts of the two would make 1000 ml of 12% ice cream base?
Click here to see answer by stanbon(75887)

Question 448076: my brother takes twice as long as me to clean a room We clean 1 room in 60 minutes. How long does it take me to cleam a room? How long does it take my brother to clean a room?

I now know the answer is from 60/x + 60/2x = 1
But I do not know how they got this equation/formula.
I do not understand why the 60 is in the numerator and not the demonimator. My way of thinking is that each guy cleaning should have his "X" over 60 and not the other way around. And I do not see why the 60 is added to 60. It is kind of like saying it takes 2 hours to clean a room (120 Minutes).
Click here to see answer by jorel1380(3719)

Question 448243: A mettallurgist needs to make 12.4lb of an alloy containing 50% gold. He is going to melt and combine on emetal that is 60% gold with another metal that is 40% gold. how much of each should he use?
Click here to see answer by stanbon(75887)

Question 448268: Ground beef sells for $4.75 per kg and ground pork sells for $ 5.50 per kg. How many kilograms of ground pork should be mixed with 8 kg of ground beef to make a mixture that sells for $5.10 per kg?
Click here to see answer by stanbon(75887)

Question 448309: A milk tank can be filled by pip A in 6 hours, by pipe B in 8 hours and by pipe C in 12 hours. how long will it take all three pipes working together to fill the tank?
Click here to see answer by mananth(16946)

Question 448417: How much 25% hcl and 60% hcl will it take to make 200 ml of 45% hcl?
Click here to see answer by jorel1380(3719)

Question 448491: how many liters of a 20% solution should be mixed with 10 liters of a 10% salt solution so the resulting solution is 16% salt?
Click here to see answer by rwm(914)

Question 447064: solution a=50%, solution b =30% what% of each do i need to get 45%
Click here to see answer by rwm(914)

Question 448389: an isotope of Strontium 90 has a half life of 38 years. if you have 500mg of this isotope today how many milligrams will you have in 19 years
Click here to see answer by ankor@dixie-net.com(22740)

Question 448571: Chocolates costing $8 per pound are to be mixed with chocolates costing $3 per pound to make a 20 pound mixture. If the mixture is to sell for $5 per pound, how many pounds of each chocolate should be used?
Click here to see answer by jorel1380(3719)

Question 448681: I am stumped on this question, please help
The number of N of aluminum cans used each year varies directly as the number of people P using the cans. If 56 people use 19,936 cans in on year, how many cans are used in a city which has a population of 1,221,000?
Thank you!
Click here to see answer by solver91311(24713)

Question 448693: I have another question that requires help
The maximum number of grams of fat (F) that should be in a diet varies directly as a person's weight (w). A person weighing 129 lb should have no more than 86 g of fat per day. What is the maximum daily fat intake for a person weighing 114 lb?
Click here to see answer by ankor@dixie-net.com(22740)

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