Questions on Word Problems: Mixtures answered by real tutors!

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Question 479688: I have a 50% solution of hydrogen peroxide and I want to make 1000mls of 30% hydrogen peroxide. How much water and concentrate should I use?
Click here to see answer by jorel1380(3719)

Question 479758: how much water must be evaproated from 8 grams of a 30% antiseptic solution to produce a 40% solution?

Click here to see answer by ewatrrr(24785)

Question 479774: sally can address a box og envelopes in 30 minutes. her broher jim can address a box of envelopes in an hour. how long would it take both working together to address a box of envelopes?

Click here to see answer by Edwin McCravy(20054)

Question 479810: 2m^3 of soil containing 35% sand was mixed into 6m^3 of soil containing 15% sand. What is the sand content of the mixture?
Click here to see answer by Alan3354(69443)

Question 479833: I'm a college grad and studying for the GMAT, and I'm having trouble solving word problems involving time, and unfortunately the pre-test software doesn't explain calculations to their answers, so I'm at a loss and kind of embarrassed. For instance, "A company has two types of machines, type R and S, operating at a constant rate, a machine of type R does a certain job in 36 hrs and machine S does that same job in 18hrs. If the company used the same number of EACH TYPE machine to do the job in 2 hours, how many machines of EACH type were used?" The answer is six, but I don't understand the calculations or the computations that were used get this answer. Thanks.

Click here to see answer by Edwin McCravy(20054)

Question 479999: good pm!!
"A retail has two kinds of tea,one priced at 15 php per pound and the other at 17 php per pound. How many pounds of the 15 php should the merchant mix with 200 pounds of the 17 php per pound to produce a mixture to sell at 15.80 php per pound?"
TNX!:D
Click here to see answer by mananth(16946)

Question 480173: I have 1/3 I need to know how many to make 1 gallon?
Click here to see answer by Maths68(1474)

Question 480287: How many liters of water should be added to 20L of a 30% acid solution to make a solution that is 10% acid?
Click here to see answer by stanbon(75887)

Question 480334: A chemist has a 40 gallon solution of alcohol and water that is 5% alchol. if 10 gallons of alchol are added to the solution, the percentage of alchol in the new soulution is?
I"m totally stuck on this and try a equation something like 40(5%)/ 40 + 10 = x/100
But i get something so off help!?
Click here to see answer by Alan3354(69443)

Question 480457: how to divide 431 (117663)
how to divide 324 (944)

Click here to see answer by MathLover1(20849)

Question 480458: Problem #1. The difference between 2 numbers are 8. Twice the smaller plus 3 times the larger is 109.
Problem #2. The perimeter of a standard basketball court is 288 ft. Find the dimensions of the basketball court if the length is 4 ft. longer than the width?
Please help and would appreciate if you can solve it with complete solutions and checking for me to understand it better...I'm having problems solving this kind step by step...thank you.
Click here to see answer by htmentor(1343)

Question 480651: How may ounces of a 30% alcohol solution must be mixed with 9 ounces of a 35% alcohol solution to make a 31% alcohol solution?
Click here to see answer by stanbon(75887)

Question 481115: A dealer mixes a lbs. of nuts worth b cents per pound with c lbs. of nuts worth d cents per pound. At what price should he sell a pound of the MIXTURE IF HE WISHES TO MAKE A PROFIT OF 10 CENTS PER POUND?
Click here to see answer by mananth(16946)

Question 481282: How much of an 80% solution has to be added to a 20% solution to make 960 mL of a 50% solution?
Click here to see answer by jorel1380(3719)

Question 481313: 1. find the decimal equivalent of the mixed number for 7 4/5
2. Subtract -5.6 - (-7)
3. Add -21 + (-7)
Please note that all work must be shown
Thank you very much - final exam due tomorrow 8/14

Click here to see answer by Alan3354(69443)

Question 481343: What quantity of 60 percent acid solution must be mixed with a 25 per cent solution to produce 504 mL of a 50 percent solution?
Click here to see answer by Alan3354(69443)

Question 481533: a can of orange juice is 12 ounces . how many grams is the can of orange juice ?

Click here to see answer by MathLover1(20849)

Question 481533: a can of orange juice is 12 ounces . how many grams is the can of orange juice ?

Click here to see answer by Alan3354(69443)

Question 481552: given A={1,3,5,7},B={2,3,5},C={3,4,5,6} evaluate each set.
a)A intersected B
b)A U C
c)B U C
d)(A U B) intersected C
e)A U (B U C)
f)(A intersected B) intersected C
G)(A intersected B) U C
any help will be appreciated.
Thank you,
JB
Click here to see answer by Theo(13342)

Question 481640: If you have 70mL of 35% solution of acid in water, how much water would you add in order to make a 25% acid solution?
Click here to see answer by stanbon(75887)

Question 481694: A chemist has 8 liters of alcohol in a mixture or 24 liters of alcohol and water.How many liters of alcohol must be added to make a mixture that will be 50 percent alcohol?

Click here to see answer by stanbon(75887)

Question 481977: I can't figure this out.
Suppose that a colony of bacteria starts with 1 bacterium and doubles in number every half hour. How many bacteria will the colony contain at the end of 24 hours?
Thank you!

Click here to see answer by solver91311(24713)

Question 481983: Population of Mexico
X-values| Y-values (in million)
1950| 25.8
1960| 34.9
1970| 48.2
1980| 66.8
1990| 81.1
Regression equation: 6.033 x 1.03^x
A) Use the exponential equation to estimate the population of mexico in 1900, if x=0 for 1900, x=1 for 1901 and so forth?
B) Use the exponential regression equation to estimate the annual rate of growth of the population of Mexico?

Sorry about the table, it won't let me do it in any other way. Those are supposed to be lines after the zeros. :/
Click here to see answer by stanbon(75887)

Question 482126: I am really struggling with this problem. I have come up with an average but am not sure where to go from here. The average I have is (2x+x+x-300)/3

Machine A can sort products twice as fast as Machine C and Machine B can sort products at a rate of 300 products fewer per minute than Machine C. If together the three machines have an average sorting rate of 2,150 products per minute, how many products per minute can Machine C sort?�
Click here to see answer by mananth(16946)

Question 482134: A container has 20 L of a mixture of alcohol and water which is 40% alcohol by volume. How much of the mixture should be removed and replaced by an equal volume of water so that the resulting solution will be 25% alcohol by volume?

Click here to see answer by mananth(16946)

Question 482675: A bag contains 36 marbles, some of which are red and the remainder of which are blue. Twice the number of red marbles is six less than the number of blue marbles. Find the number of marbles of each color. (Answer: 10 red marbles; 26 blue marbles). Just need the work to be shown. Thanks.
Click here to see answer by stanbon(75887)

Question 482880: A health clinic has a solution of bleach to sterilize petri dishes in which culture are grown. the sterilization tank contains 100 gal of a solution of 2% ordinary household bleach mixed with pure distilled water. now research indicates that concentration of bleach should be 5% for complete sterilization. how much of the solution should be drain and replaced with bleach intent to the recommended level?
Click here to see answer by stanbon(75887)

Question 482792: Every minute an bacteria splits into two halves, each one growing to the same size as parent. In 60 minute, the multitude of a germ completely fill the container they are in. to the nearest minute , how much time was needed to half fill the container?
Click here to see answer by ankor@dixie-net.com(22740)

Question 482939: A chemist has 400g of salt solution that is 10% salt. How many grams of 20% salt solution must be added to obtain a 12% solution of salt?
Click here to see answer by jorel1380(3719)

Question 483024: for cleaning areas around food how much bleach to 3 quarts of water should we use to clean

Click here to see answer by Alan3354(69443)

Question 483086: Please solve this problem: Raisins cost $4.00/lb and peanuts cost $3.00/lb. A 60lb mixture or raisins and peanuts cost $3.40/lb. How many pounds of each type of food is in the mixture?
Click here to see answer by scott8148(6628)

Question 483802: At a veterinary clinic, a special high protein dog food that costs 6.75 per pound is mixed with a vitamin supplement that costs per pound. How many pounds of each should be used to make a lb mixture that costs per pound?
Click here to see answer by solver91311(24713)

Question 484159: How many 3 1/3' feet pieces of wire can you cut from a 68' foot long
Click here to see answer by jorel1380(3719)

Question 484159: How many 3 1/3' feet pieces of wire can you cut from a 68' foot long
Click here to see answer by Theo(13342)

Question 484281: What strength of 20 ml acid should be added to 10 ml of 50% acid to get an average strength of 20% acid?
Click here to see answer by ankor@dixie-net.com(22740)

Question 484413: The mad scientists in a chemistry lab have 75ml of pure acid which must be diluted to a solution that is 10% acid. How many milliliters of water should they add? I used other sources and got an answer of 675 ml of water, but I don't know if it's right.
Click here to see answer by ankor@dixie-net.com(22740)

Question 484542: Can you help me answer this: A car radiator contains 10 liters of 30% solution. How many liters will have to be replaced with pur antifreeze if the resulting solution is to be 50% antifreeze?
Is 4 liters correct?
Click here to see answer by chessace(471)

Question 484763: Hi this is a word problem that i need help with.
The school rowing team was practicing on the river. They were clocked by the coach and took 10 minutes to cover 1500 metres with the current flowing against them. If there had been no current they would have taken 7.5 mintues.
How many kilometers an hour was the current flowing?
Click here to see answer by Theo(13342)

Question 484827: A cook used all of a 2-pound chunk of cheese in making three recipes. Recipe I used one-third as much cheese as Recipe II did, and Recipe II used one-half as much cheese as Recipe III.
a. What part of the whole chunk of cheese, and how many pounds, did each recipe use?
b. If the whole chunk of cheese cost $6.60, how much was the cheese in each recipe worth.
Click here to see answer by htmentor(1343)

Question 484749: How much water evaporated from 90 mg of a 2% salt solution to produce a 3% salt solution?
Click here to see answer by ankor@dixie-net.com(22740)

Question 484918: you are giving an older friend directions to your cottage.you sat that it is 325km to the cottage.The friend knows they can go 60/hr.How long will it take them to get to the cottage?
Click here to see answer by Tatiana_Stebko(1539)

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