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Question 828782: a test consists of 10 true or false questions to pass the test a student must answer at least 8 questions correctly. if the student guesses on each question what is the probability that the student will pass?
Click here to see answer by stanbon(75887)

Question 828788: Mr. Parker will mix antifreeze and water in a ratio of 2 to 1 he needs 27 quarts of the antifreeze and water mixture how much antifreeze and water should mr. Parker mix together?
Click here to see answer by stanbon(75887)

Question 828821: A college bookstore adds 25% to the publisher's price before selling a textbook to students. If a student pays $80 for a College Algebra text, how much did the bookstore pay for the book
Click here to see answer by rfer(16322)

Question 828859: the ratio of A to B is 1.37 to 1 and there are 53.2g of A. How many grams of B are predicted by this ratio?
Click here to see answer by richwmiller(17219)

Question 828883: How many kilograms of water must be evaporated from 80kg of 20 percent salt solution to produce a 25 percent salt solution

please hurry and use system of equations
Click here to see answer by josgarithmetic(39617)

Question 828861: a= b/c a= 10.7 b=0.59 what is the value of c?
Click here to see answer by Fombitz(32388)

Question 828990: 500gm of salt solution has 30% salt in it.how much salt should be added to make the salt 50% in the solution?
Click here to see answer by stanbon(75887)

Question 829021: A chemist mixes distilled water with a 85 percent solution of sulfuric acid to produce a 45 percent solution. If 7 liters of distilled water are used, how much 45 percent solution is produced?
Click here to see answer by TimothyLamb(4379)

Question 829051: A farmer has 500$, He has to buy 100 animals. A cow costs 10, pig costs 1, and horse costs 50. You need to buy one of each at least.
Click here to see answer by TimothyLamb(4379)

Question 829209: what is 425,147-216,083= showing me the work please
Click here to see answer by Alan3354(69443)

Question 829284: Dino has 20 ounces of 20% of salt solution, how much salt should he add to make it a 25% solution
Click here to see answer by TimothyLamb(4379)

Question 829140: How many liters of a 5% solution of salt should be added to a 19% solution in order to obtain 700 liters of a 8% solution?
Click here to see answer by josgarithmetic(39617)

Question 828932: We have 500 ml of soda solution (density = 1.08 g/ml and 8% (m/m) soda).
We need to make a soda solution which contains 15% (m/m) soda.
How much of crystal soda (62.9% (m/m) water) do we need to add?
Click here to see answer by josgarithmetic(39617)

Question 829361: If 5 lbs of mixed nuts containing 50% peanuts was mixed with 20 lbs of mixed nuts containing 75% of peanuts what percent of the new mixture is peanuts?
Click here to see answer by TimothyLamb(4379)

Question 829370: one cleaning fluid contains 6% ammonia, while a second contains 26% ammonia. In blending these fluids, at most how many liters of the second may be added to 10 liters of the first, if the percent of ammonia in the mixture is not to exceed 16%?
Click here to see answer by josgarithmetic(39617)

Question 829357: What is the correct way to write and solve the problem for how much is 20% less than 12 ounces?
Click here to see answer by josgarithmetic(39617)

Question 829447: If my puppy weighs 16 pounds at 6 months and the vet says this is probably 60% to 80% of what he will weigh as an adult, how much can I expect my dog to weigh as an adult?
Click here to see answer by Alan3354(69443)

Question 829456: Two domestic parcel companies collect their charges as follows: Company A collects $5 for every pound and a service charge of $3. Company B collects $7 for every pound and a service charge of $2. For what weight of the parcel is the charge same in both companies?

Click here to see answer by stanbon(75887)

Question 829461: What is the cost of buying 6kg of nuts at �3.00 per 500g ?
Click here to see answer by stanbon(75887)

Question 829453: How many gallons of a 14% salt solution must be mixed with a 38% salt solution to make 40 gallons of 20% salt solution?

Click here to see answer by stanbon(75887)

Question 829466: In order to make a necklace Alicia purchased 80 beads for a total of $39 excluding tax. Some of the beads were sterling silver beads that cost 40 cents each and the rest were gemstone beads that cost 65 cents each how many of each type of bead did Alicia buy ?
Click here to see answer by oscargut(2103)

Question 829474: E chem testing has a solution that is 80% base and another that is 30% base. A technician needs 150L of a solution that is 62% base. The 150L will be prepared by mixing two solutions on hand . How much of each should be used?
Click here to see answer by josgarithmetic(39617)

Question 829638: John spent $3.00 on a 3/4 pound bag if cereal. How much will it cost per pound?
Click here to see answer by lwsshak3(11628)

Question 829618: Betty can mop the floor in 8 minutes. Together Betty and Nancy can mop the floor in just 6 minutes. How long does it take Nancy to mop the floor alone?

Click here to see answer by LinnW(1048)

Question 829683: How much water would you add to 2 1/2 gallons of bleach to make a 10% bleach solution?
Click here to see answer by TimothyLamb(4379)

Question 829789: carl is doing an experiment that calls for a 50% saline solution. He is has 50 milliliters (mL)of puren saline should carl add to obtain the required 50% solution ?
Click here to see answer by josgarithmetic(39617)

Question 829753: How many gallons of an 8% solution must you add to a 15% solution to get 20 gallons of a 10% solution? Round to the nearest one-tenth gallon.
Click here to see answer by josgarithmetic(39617)

Question 829772: there are 60 cherries and 45 cashews he wants to have the greatest number of cakes with the same amount of cherries and cashews?
Click here to see answer by JulietG(1812)

Question 829840: How to calculate a 3% solution (of 1000mls) from a 93% stock (of 100mls).
I have tried the method...

but am a little confused and not really sure if it the formula that I ought to be using.
C1 = 93% [x100] = 0.93
V1 = 100mls
C2 = ? [I don't know what goes here]
V2 = 1000mls
V1 = (V2 x C2) / C1 = ? 100ml = (1000mls x C2) / 100mls = ?
I get stuck at C2! What is this meant to be? Where do I get the number from?

Is this even the right formula for me?!
I have a stock that is a 93% solution, but I have 1000mls of water that I need to be at 3%.
Hope you can help or confuse me!
Thank you
:)
Mariana

Click here to see answer by TimothyLamb(4379)

Question 830094: 2000 kg of steel containing 8% nickel is to be made by mixing a steel containing 14% Ni, with another containing 6% nickel.How much of each is needed?
Click here to see answer by richwmiller(17219)

Question 830167: a 3.60-mL volume of seawater contains about 4.00X10 to the negative 10 power in grams of gold. The total volume of ocean water is about 1.50X10 to the 21 power in liters. calculate the total worth of gold in all the world's oceans if the price of gold is $19.64 per gram
Click here to see answer by josgarithmetic(39617)

Question 830191: You are offered two different sales jobs. The first company offers a straight commission of 7% of the sales. The second company offers a salary of $ 420 per week plus 2% of the sales. How much would you have to sell in a week in order for the straight commission offer to be at least as good?
Click here to see answer by TimothyLamb(4379)

Question 830335: what is 40% of 120
Click here to see answer by Fombitz(32388)

Question 830373: Peacans that cost $28.50 per kilogram were mixed with almond that cost $22.25 per kilogram. How many kilogram of each used to make a 25 kilogram mixture costing mixture $24.25 per kilogram.
Click here to see answer by josgarithmetic(39617)

Question 830370: a 10-lb mixture of peanuts, cashews, and raisins sell for $14. Peanuts cost $1 per pound, cashews cost $2 per pound, and raisins cost $1.50 per pound. The weight of peanuts in the mixture is twice the weight of cashews in the mixture.
A. write a system of equations that represent the problem
B. find the number of pounds of each ingredient in the mixture.
Click here to see answer by josgarithmetic(39617)

Question 830365: Danielle and her brother mixed together some soil and some clay to make 10 yd^3 of soil with 84% clay content. They used 6 yd^3 of clay and 4 yd^3 of a soil that they purchased. What was the clay content of the soil that they purchased?
Click here to see answer by josgarithmetic(39617)

Question 830386: Nancy needs 14lb of metal with 31% silver. If nancy combines one metal with 27% silver, and another with 74% silver, how much of each metal does Nancy need?
Click here to see answer by josgarithmetic(39617)

Question 830538: How many liters of a 7 \% solution of salt should be added to a 27 \% solution in order to obtain 760 liters of a 15 \% solution?

Click here to see answer by josgarithmetic(39617)

Question 829559: . Roman mixes 12 liters of 8% acid solution with a 20% acid solution, which results in a 16% acid solution. Write an equation to determine the number of liters of 20% acid solution in the new mixture

Click here to see answer by josgarithmetic(39617)

Question 828510: how many grams of water must be evaporated from 10kg of a 60% salt solution to produce a 50% salt solution?
Click here to see answer by josgarithmetic(39617)

Question 827900: How many pounds of dog food worth $.80 per pound must be mixed with dog food worth $.65 per pound to make a mixture of 60 pounds worth $.70 per pound?
Click here to see answer by josgarithmetic(39617)

Question 830666: how many liters of a 90% acid solution must be mixed with a 30% acid solution to get 600l of a 80% acid solution
Click here to see answer by josgarithmetic(39617)

Question 830717: We need 15 quarts of 30% antifreeze solution. We have 20% antifreeze and 50% antifreeze to mix together to make it. How much of each should we mix together?
Click here to see answer by nerdybill(7384)

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