A 400 gallon tank initially contains 100 pounds ofsalt in a mixture of 200 gallons of brineAnother brine containing 2 lb.of saltper gallon is being added to the tank at a rate of 10 gallons per minute.Themixed brine in the tank flows out at a rate of

A 400 gallon tank initially contains 100 pounds ofsalt in a mixture of 200 gallons of brineAnother brine containing 2 lb.of saltper gallon is being added to the tank at a rate of 10 gallons per minute.Themixed brine in the tank flows out at a rate of 问一道数学题,涉及到微分方程a tank contains 4 lbs of salt dissolved in 100 gallons of water.Suppose that brine containing 2 lbs of salt per gallon of water is allowed to enter the tank at a rate of 5 gallons/minute,and that the mixed solu sat 史上最难最崩溃的题目.关键是我看不懂看题：Barb's motor scooter has a 2-gallon gas tank and can travel m miles on 1 gallon of gas.If gas costs $1.25 per gallon and Barb spends d dollars to fill the tank; which of the followi Fast Lane这首歌里面的黑人Fast Lane这首歌唱Livin' life in the fast lane,Movin' at the speed of life and I can't slow down,Only got a gallon in the gas tank,But I'm almost at the finish line,so I can't stop now这段的那个黑人! 英语翻译located at the NASA Rearch Centre in Iowa is a 5,ooo--gallon vat of water and inside the tank is an underwater treadmill designed by Dava Newman,an aerospace engineer.这里面的is 怎么翻译?搞不清楚什么时候翻译成“是”, 英语翻译a vehicle uses 1 tablespoon of gasoline to drive 125 yards.how many miles can the vehicle travel per gallon?round your answer to the nearest mile.hint:there are 256 tablespoons in a gallon. Tank three grades of milk are 1percent,2percent,3percent fat by volume,if x gallon of 1 percent,y gallon of 2percent and z gallon of 3percent are mixed to give x+y+z gallons of a 1.5percent grade ,what is x in terms of y and if the air in a tank is removed with each stroke of a vacuum When n liters of fuel was added to a tank that was already full,the tank was filled to of its capacity.In terms of n,what is the capacity of the tank,in liters? It is not good to put onlt a little water in the fish tank It is not good to put onlt a little water in the fish tank SAT问题：Milk costs x cents per half-gallon and y cents per gallon. If a gallon of milk costs z cMilk costs x cents per half-gallon and y cents per gallon. If a gallon of milk costs z cents less than 2 half-gallons, which of the following equation a closed cylindrical tank contains 36 pie cubic feet of water,and is filled to half of its capacity.when thr tank is placed upright on its circulat base on level ground.the height of the water in the tank is 2 feet,when the tank is placed on its side In the tank there are fish swimming happily..A.a little B.much C.a few D.littleIn the tank there are fish swimming happily..A.a little B.much C.a few D.little 英语翻译1.A man spends $88 for gas and oil in making a trip.He uesd 10 quarts of oil at $1.50 per quart.If gasoline was $1.46 a gallon and he averaged 18 miles to the gallon,how many miles did he travel?2.Linda has 26 feet of ribbon.She uses 7/3 英语翻译1.A man spends $88 for gas and oil in making a trip.He uesd 10 quarts of oil at $1.50 per quart.If gasoline was $1.46 a gallon and he averaged 18 miles to the gallon,how many miles did he travel?2.Linda has 26 feet of ribbon.She uses 7/3 I got a beautiful goldfish.Why not _____(go) and watch it swim in the fish tank?