MINDTAP duction to Differential Equations 36&snapshotid-843593& N MATH 2775, 800 In Problems 17. 18. 19. 20. 21. 22. 23. and 24 determine a region of the zy-plane for which the given differential equation would have a unique solution whose graph passes through a point (, ) in the region. σ E Answer + 18. half-planes defined by either y> 0 or y<0 halfl Q Search Web %6 8 6 7 8 0 AA AD&QRO Week 1 Assignment x Cengage Learning M MindTap-Cengage Lex MATH 2770, section C ndex.html?elSBN 9780357048634&id=324926382&snapshotid=843593& NDTAP tion to Differential Equations 9013 Q Search th AA Mixtures 9. Suppose that a large mixing tank initially holds 300 gallons of water in which 50 pounds of salt have been dissolved. Pure water is pumped into the tank at a rate of 3 gal/min, and when the solution is well stirred, it is then pumped out at the same rate. Determine a differential equation for the amount of salt A(t) in the tank at time t>0. What is A(0)?, Answer dA + dt 100 A(0)-50 10. Suppose that a large mixing tank initially holds 300 gallons of water in which 50 pounds of salt have been dissolved. Another brine solution is pumped into the tank at a rate of 3 gal/min, and when the solution is well stirred, it is then pumped out at a slower rate of 2 gal/min. If the concentration of the solution entering is 2 lb/gal, determine a differential equation for the amount of salt A(t) in the tank at timet > 0. 0 Q Search Web ЛА 6 7 8 9