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Question 449124: The radiator in Natalie�s car contains 6.3 L of antifreeze and water. This mixture is 30% antifreeze. How much of this mixture should she drain and replace with pure antifreeze so that there will be a mixture of 50% antifreeze?
Click here to see answer by mananth(16946)

Question 449120: How many liters of a 50% alcohol solution must be mixed with 90 liters of a 90% solution to get a 80% solution? Answer is 30L and I keep getting REALLY high numbers.
Click here to see answer by mananth(16946)

Question 449154: What is 18 raised to the power of 2/3?
Click here to see answer by josmiceli(19441)

Question 449153: One pump takes 4 hours to fill up 20 gallons, another takes 5 hours to fill 20 gallons .If the two pumps work together, how many gallons will they fill in 8 hours?
Click here to see answer by josmiceli(19441)

Question 449212: If 8.5 litres are removed from a tank that is 3/7 full, then it will be 1/8 full. How many litres does the tank hold when it is full?
Click here to see answer by stanbon(75887)

Question 449382: A 5% solution of a drug is to be mixed with some 15% solution and some 10% solution to get 20 ml of 8% solution. The amount of 5% solution used must be 2 ml more than the sum of the other two solutions. Set up a system of equations that could be used to determine the number of ml of each solution that should be used.
Click here to see answer by stanbon(75887)

Question 449332: An old fashion country school room has double desks. If each student in the class sits at a different desk, there are 2 students without seats. If 2 students sit together at a double desk, there is one empty desk. How many students and how many desks are there in the class?
Click here to see answer by ankor@dixie-net.com(22740)

Question 449412: How much water must be added to 3 quarts of a 30 percent acid solution for form a 20 percent acid solution
Click here to see answer by jorel1380(3719)

Question 449905: Clear Shine window cleaner is 12% alcohol and sunstream window cleaner is 30% alcohol. How much of each should be used to make 90 ounces of a cleaner that is 20% alchohol.

Click here to see answer by rwm(914)

Question 450199: Theresa Morgan, a chemist, has a 25% hydrochloric acid solution and a 50% hydrochloric acid solution. How many liters of each should she mix to get 10 liters of a hydrochloric acid solution with a 40% acid concentration?
Click here to see answer by edjones(8007)

Question 450277: Community Coffee Co. wants a new flavor of Cajun coffee. How many pounds of coffee worth $7 a pound should be added to 14 pounds of coffee worth $4 a pound to get a mixture worth $5 a pound?
Click here to see answer by jorel1380(3719)

Question 450189: A mechanic nees a radiator to have a 40% antifreeze solution. The radiator currently is filled with 4 gallons of a 25% antifreeze solution. How much of the antifreeze mixture should be drained from the car if the mechanic replaces it with pur antifreeze?
Click here to see answer by ankor@dixie-net.com(22740)

Question 450288: An architect designs a rectangular flower garden such that the width is exactly two-thirds of the length. If 260 feet of antique picket fencing are to be used to enclose the garden, find the dimension of the garden
Click here to see answer by jorel1380(3719)

Question 450294: A new self tanning lotion for everyday use is to be sold. First, an experimental lotion mixture is made by mixing 800 ounces of everyday moisturizing lotion worth $3 per ounce. If the experimental lotion is to cost $1.20 an ounce, how many ounces of the self-tanning lotion should be in the mixture?
Click here to see answer by jorel1380(3719)

Question 450357: how much pure acid should be mixed with 5 gallon of a 20% acid solution in orde to get a 50% acid solution
Click here to see answer by mananth(16946)

Question 450357: how much pure acid should be mixed with 5 gallon of a 20% acid solution in orde to get a 50% acid solution
Click here to see answer by jorel1380(3719)

Question 450144: A merchant has coffee worth $20 a pound that she wishes to mix with 50 pounds of coffee worth $50 a pound to get a mixture that can be sold for $40 dollars a pound. How many pounds of the $20 coffee should be used?
Click here to see answer by htmentor(1343)

Question 450548: Oh Nuts! sells cashews for $6.75 per pound and Brazil nuts for $5.00 per pound. How much of each type should be used to make a 50-lb mixture that sells for $5.70 per pound?
Click here to see answer by stanbon(75887)

Question 450558: Lydia bought a stack of magazines to resell for profit. She sold half of them on Tuesday. She sold 10 on Wednesday. She sold half of what was left on Thursday. On Friday she sold the remaining 8 magazines. How many magazines did she begin with?

Click here to see answer by stanbon(75887)

Question 450567: Find the probability of exactly eight boys in ten births
Click here to see answer by edjones(8007)

Question 450508: Here is a pyramid of 10 bricks. It is 4 bricks high.
Suppose we make the pyramid 50 bricks high. How many bricks will we need?
Explain your thinking and your answer(s).
Click here to see answer by jorel1380(3719)

Question 450657: One thousand liters a solution was available, but the solution was 60% alchohol. Barry needed a solution which was 50% alcohol. How many liters of alcohol had to be extracted so that the solution would be 50% alcohol?
Click here to see answer by edjones(8007)

Question 451040: Theresa Yee, a chemist, has a 25% hydrochloric acid solution and a 50% hydrochloric acid solution. How many liters of each should she mix to get 10 liters of a hydrochloric acid solution with a 40% acid concentration?
Click here to see answer by rwm(914)

Question 451011: A chemist needs to mix a 75% saltwater solution with a 50% saltwater solution to obtain 10 gallons of a 60% solution. How many gallons of each must be used?
I just need to know how to figure this out if you have the time. Thanks.

Click here to see answer by rwm(914)

Question 451165: Theresa Yee, a chemist, has 25% hydrochloric acid solution and a 50% hydrochloric acid solution. How many liters of each should she mix to get 10 liters of a hydrochloric acid solution with a 40% acid concentration?
Click here to see answer by rwm(914)

Question 450192: A car radiator holds 2 gallons of fluid and initially is empty. If a mixture of water and antifreeze contains 70% antifreeze, how much of each should be combined to fill the radiator with a 50% antifreeze mixture?
Click here to see answer by rwm(914)

Question 451166: A stone is thrown directly upward from a height of 30ft with an intial velocity of 60ft/sec. the height of the stone t seconds after it has been thrown is given by the function s(t)= -16t^2 +60t+30. Fine the time at which the stone reaches its maximum height and find that maximum height
Click here to see answer by Alan3354(69443)

Question 451183: A chemist wishes to make 2 L of an 8% acid solution by mixing a 10% acid solution and a 5% acid solution. How many litters of each solution should the chemist use?

Click here to see answer by nerdybill(7384)

Question 451238: Twenty liters of a 20% acid solution is obtained by mixing 30% acid solution and a 5% acid solution. How many liters of each solution are needed to obtain the specified mixture?
Click here to see answer by jorel1380(3719)

Question 451451: A 30 ml solution of alcohol and water is 10% alcohol. How much water must be added to result in a 5% solution?
Click here to see answer by robertb(5830)

Question 451435: pure acid is to be added to a 20% solution to obtain 60 liters of a 30% acid solution. what amounts of each should be used?
Click here to see answer by robertb(5830)

Question 452064: a baker purchased 12 lb of wheat flour and 15 lb of rye flour for a total cost of 18.30. a second purchase, at the same prices, included 15 lb of wheat flour and 10 lb of rye flour. the cost of the second purchase was 16.75. find the cost per pound of the wheat flour and of the rye flour.
Click here to see answer by pedjajov(51)

Question 452290: What is 1/24 of $500.00 as a monthly payment. Believe it or not, I was a physics major in college and am pregnant. I just cant figure this out.. HELP !! haha..
Click here to see answer by Alan3354(69443)

Question 452936: a 10% and a 20% salt solution are combined to make 12 gallons of 15% salt solution. How much of each strength solution is required?

Click here to see answer by mananth(16946)

Question 453071: I have a Pond 10' x 8'x 3' deep, how many gallons is that?
Click here to see answer by ankor@dixie-net.com(22740)

Question 453055: solution A is 40% acid. Solution B is 80% acid. How much of each is needed to make 120 liters of a solution that is 50% acid?
Click here to see answer by robertb(5830)

Question 453422: 100 grams of ice cream equals 15 grams of fat, how many grams of fat are in 260 grams of ice cream?
Click here to see answer by stanbon(75887)

Question 453845: Buttermilk has 6% butterfat, 1% milk has (obviously) 1% butterfat. How much buttermilk must be added to 5 gallons of 1% milk to make a solution of "whole milk" (whole milk has 4% buttermilk)?
Click here to see answer by mananth(16946)

Question 454159: Can someone help me with the question below, I am lost. Thank you.
Given A = {2, 4, 6}, B = {1, 3, 5}, and C = { 1, 2, 3, 4, 5, 6, 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

Click here to see answer by Edwin McCravy(20054)

Question 454387: A store mixes Brazilian coffee worth $11 per kilogram and Venezuelan coffee worth $14 per kilogram. The mixture is to sell for $12 per kilogram. Find how much of each should be used to make a 600-kilogram mixture.
Click here to see answer by mananth(16946)

Question 454633: 10 Liters of a 20% acid solution are mixed with 30 Liters of a 30% acid solution. What is the concentration of acid in the final mixture?
Remember:
Concentration = (the number of Liters of pure acid) / (total number of Liters in the mixture)
Click here to see answer by stanbon(75887)

Question 454720: 5% of the population is poor
30% of the population is homeless
What % of the poor is homeless
Click here to see answer by richard1234(7193)

Question 454822: if 2 number is added to a number and the sum is triped,

Click here to see answer by richwmiller(17219)

Question 454160: Can someone assist mew in asnwering this worpd problem?

Click here to see answer by richwmiller(17219)

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