Atank contains 225 l of water. a solution with a salt concentration of 0.4 kg/l is added at a rate of 5 l/min. the solution is kept mixed and is drained from the tank at a rate of 3 l/min. if
y(t)
is the amount of salt (in kilograms) after t minutes, show that y satisfies the differential equation
dy/dt = 2 - 3y/(225+2t)
solve this equation and find the concentration after 20 minutes.

steve should create a type of business report called a business plan. the correct option among the options that are already given in the question is the last or the fourth option. this business report created by steve will actually influence the investors about investing their money in steve's business. this business report will have all the details about the business, the amount of investment required and the amount of expected profit.

step-by-step explanation:

duck you

after 1 year: 221 deer

step-by-step explanation:

30% of 170 is 51. 170+51=221

its very big question plz make it small