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Question 1115451: A chemist needs 110 milliliters of a 80% solution but has only 76% and 98% solutions available, find out how many milliliters of each that should be mixed to get the desired solution
Click here to see answer by greenestamps(13200)

Question 1115464: Forty litres of 50% acid solution should be mixed with 20% acid solution. How much of the 20% acid solution
must be used so that the resulting solution contains only 40% acid?
Click here to see answer by josgarithmetic(39618)

Question 1115418: How many six-digit numbers divisible by 20 can be formed from the digits 0, 1, 2, 3, 4, 5 (with repetition).

Click here to see answer by ikleyn(52794)

Question 1115418: How many six-digit numbers divisible by 20 can be formed from the digits 0, 1, 2, 3, 4, 5 (with repetition).

Click here to see answer by MathTherapy(10552)

Question 1115467: In Video City, they charge their members an annual fee, and a rental fee for each DVD borrowed. In one year,
Ron rented 12 DVDs and paid 814 pesos. In the same year, Jane rented 29 DVDs and paid 1188 pesos. What is the rental and
the annual fee?
Click here to see answer by addingup(3677)

Question 1115612: You have 10 cups of a drink that contains 76% water. How many cups of a drink containing 70% water needs to be added in order to have a final drink that is 74% water?

Click here to see answer by josgarithmetic(39618)

Question 1115616: A dairy needs 232 gallons of milk containing 6% butterfat. How many gallons each of milk containing 7% butterfat and milk containing 3% butterfat must be used to obtain the desired 232 gallons?
Click here to see answer by Alan3354(69443)

Question 1115611: A metallurgist has one alloy containing 23% titanium and another containing 51% titanium. How many pounds of each alloy must he use to make 56 pounds of a third alloy containing 47% titanium?
Click here to see answer by Alan3354(69443)

Question 1115859: A plant food is to be made from three chemicals. The combined amounts of the first two chemicals must be 70% of the resulting mix. The second and third chemicals must be in the ratio of 4 to 3 by weight. How much of each chemical is needed to make 700 kg of the plant food?
Click here to see answer by josgarithmetic(39618)

Question 1115908: a pharmacist needs to make a 1% hydrocortisone cream. How many grams if 2.5% hydrocortisone should be added to 15 grams of cream base (0% hydrocortisone) to make the 1% cream?
Click here to see answer by ikleyn(52794)

Question 1115906: how many gallons of 65% antifreeze and how many gallons of 20% antifreeze should be mixed to obtain 50 gallons of a 56% mixture of antifreeze?
Click here to see answer by ikleyn(52794)

Question 1115904: a solution contains 3% salt. How much water should be added to 20oz. of this solution to make a 1.2% solution?
Click here to see answer by stanbon(75887)

Question 1115924: Tickets for a certain show cost $18, $25, or, for VIP seats, $39. If tenten times as many $18 tickets were sold as VIP tickets, and the number of $18 tickets sold was 56 more than the sum of the number of $25 tickets and VIP tickets, sales of all three kinds of tickets would total $54,988. How many of each kind of ticket would have been sold?
Click here to see answer by josgarithmetic(39618)

Question 1116078: A Chemist needs 170 milliliters of a 36% solution but has only 24% and 58% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
Click here to see answer by greenestamps(13200)

Question 1116274: Jonathon invested $8,400, part at 12 percent annual interest and the remainder at 8 percent annual interest. In one year, he earned three times as much interest from the 12 percent investment as he did from the 8 percent investment. How much interest did Jonathon earn at 8 percent interest?
The answer should be $224. How did I achieve that answer What formula should be used and where should the percentages go into the formula?
Click here to see answer by greenestamps(13200)

Question 1116513: A chemist wants to mix a 65% alcohol solution with 10 liters of a 45% alcohol solution to produce a solution that is 55% alcohol. How many liters of the 65% alcohol solution should be used?
Click here to see answer by josgarithmetic(39618)

Question 1116657: At a scrapbooking party, guests brought a certain number of photographs to use based on how many pages they will be assembling. Sharon plans to assemble three small pages and seven large pages and brought a total of 26 photographs to use. Whitney brought 16 photographs which is enough to assemble three small pages and two large pages assuming that the number of photographs on a page remains constant how many photographs fit on a small page and a large page?
Click here to see answer by josgarithmetic(39618)

Question 1116660: An event organizer is reserving rooms for two company-wide events. For the quarterly meeting this month, she reserved 3 conference rooms and 5 ballrooms, which can seat a total of 379 attendees. For safety training next month, she reserved 3 conference rooms and 4 ballrooms, which can seat 314 attendees. How many attendees can each room accommodate?
Click here to see answer by ikleyn(52794)

Question 1116744: A 59% copper alloy is made by mixing 20g of a 43% copper alloy with some 63% copper alloy. The number of grams of 59% copper alloy produced is
a) 120 b)110 c)100 d)90 e) 80
Click here to see answer by josgarithmetic(39618)

Question 1116655: Bryan and Yuan started out at their houses and are biking towards each other. Brian started out first, and has already gone 5 miles. He bikes at a constant speed of 3 mph. Yuan just left, and rides at 4 mph when the boys meet halfway between their houses, they will continue to the park together. How long will that take? How far will each boy have ridden?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1116889: A yogurt company blends regular yogurt that is 4% fat with its no-fat yogurt to obtain low-fat yogurt that is 1% fat. How many pounds of non-fat yogurt must be mixed to obtain 50 pounds of low-fat yogurt?
Click here to see answer by josmiceli(19441)

Question 1116913: TV1 and TV2 are television channels both showing films that Start at 8:30 PM. TV1 puts on advertisemeants every 10 minutes after the start of a film. TV2 to puts on Advertisements every 15 minutes after the start of a film.
If the shortest film ends after two hours, how many times (during the films) will advertisements appear on both channels at the same time?
Click here to see answer by ikleyn(52794)

Question 1116911: The plank of wood cost �3.00 per metre and can be bought in lengths of 250cm.
The planks are 20cm wide and 2cm thick.
What will it cost to buy each plank of wood?
Click here to see answer by josgarithmetic(39618)

Question 1116914: TV1 and TV2 are television channels both showing films that Start at 8:30 PM. TV1 puts on advertisemeants every 10 minutes after the start of a film. TV2 to puts on Advertisements every 15 minutes after the start of a film.
If the shortest film ends after two hours, how many times (during the films) will advertisements appear on both channels at the same time?
Click here to see answer by josgarithmetic(39618)

Question 1117002: there are 9 freshmen, 8 sophomores, 4 juniors living in a dorm, how manny ways can they form a group of 1 freshmen, one sophomore and 1 junior ?
Click here to see answer by Alan3354(69443)

Question 1117049: A chemist wishes to mix a solution that is 12% acid. She has on hand 10 liters of a 2% acid solution and wishes to add some 16% acid solution to obtain the desired 12% acid solution. How much 16% acid solution should she add?
Click here to see answer by ikleyn(52794)

Question 1116871:
Click here to see answer by Alan3354(69443)

Question 1117132: How much water should be added to 1000 cu. cm. of 80% sugar solution to prepare a 35% solution?
Click here to see answer by addingup(3677)

Question 1117132: How much water should be added to 1000 cu. cm. of 80% sugar solution to prepare a 35% solution?
Click here to see answer by greenestamps(13200)

Question 1117131: How many kilograms of sand must be added to 300 kg of a mixture of sand and cement containing 40% cement to produce a mixture which will be 75% sand?
Click here to see answer by ikleyn(52794)

Question 1117207: A ball is thrown vertically upward. After t seconds, its height h (in feet) is given by the function h(t)=116-16t^2 .
What is the maximum height that the ball will reach? Do not round your answer.
Click here to see answer by Alan3354(69443)

Question 1117313: Beth has a bottle half filled with water. She drinks two-thirds of the water and gives the remaining water, 240 ml, to Mary. How much water would the bottle contain if it were full?
Click here to see answer by jim_thompson5910(35256)

Question 1117445: 1. Mr. Gardener has two kinds of solutions containing fertilizer and water. One of the solutions is 10% fertilizer and the other is 30% fertilizer. Mr. Gardener needs 200 liters of a 24% fertilizer solution. How much of the 10% solution should Mr. Gardener use in order to have the 24% fertilizer solution?

2. The top floor of the school building is a rectangle whose perimeter is 320 feet. The width is 30 feet less than the length. What is the width of the rectangle?

3. Jane can clean the living room in 3 hours, Kai in 6 hours, and Dana in 8 hours. If they work together, in how many minutes can they clean the entire room?

4. Rachelle invested part of $185 000 at 7% and the rest 9%. If the interest from 9% investment is $1 450 more than the interest earned at the 7% investment. How much did she invest at the 9% rate?

5. Joy's house, the supermarket, and Marty's office are on a straight road. Joy rode her car and traveled with a speed of 60 kph for 10 minutes. Marty left his office to meet Joy at the supermarket. He used his car and traveled at the speed of 90 kph for 5 mins. How far is Marty's office from Joy's house?
Click here to see answer by Theo(13342)

Question 1117472: To get 150 grams of a 12% solution, do you need more salt than to get 120 grams of a 15% solution?
Click here to see answer by solver91311(24713)

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