Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

baddinlol Group TitleBest ResponseYou've already chosen the best response.0
A fish tank initially has 4kg of salt dissolved in 100L of water.
 2 years ago

baddinlol Group TitleBest ResponseYou've already chosen the best response.0
It is decided that this concentration is too high! So, fresh water is mixed at a rate of 10L/mind, while 10L of mixture is removed per minute.
 2 years ago

baddinlol Group TitleBest ResponseYou've already chosen the best response.0
If x kg/L is the concentration of the saltwater solution in the tank t seconds after the fresh water is first added, find the differential equation for x.
 2 years ago

baddinlol Group TitleBest ResponseYou've already chosen the best response.0
I thought dx/dt = 10x
 2 years ago

baddinlol Group TitleBest ResponseYou've already chosen the best response.0
But i got the answer wrong
 2 years ago

suvesh253 Group TitleBest ResponseYou've already chosen the best response.0
water remains constant at 100L. Only salt concentration changing with time
 2 years ago

baddinlol Group TitleBest ResponseYou've already chosen the best response.0
So concentration = 100x?
 2 years ago

suvesh253 Group TitleBest ResponseYou've already chosen the best response.0
i think it will be dx/dt = 4  0.4t
 2 years ago

suvesh253 Group TitleBest ResponseYou've already chosen the best response.0
sorry 100 dx/dt = 4  0.4t
 2 years ago

baddinlol Group TitleBest ResponseYou've already chosen the best response.0
I got the solution, it says 10dx/dt + x = 0
 2 years ago

baddinlol Group TitleBest ResponseYou've already chosen the best response.0
But i dont know how they got that
 2 years ago

suvesh253 Group TitleBest ResponseYou've already chosen the best response.0
maybe it's like this : salt concentration is being reduced by 10 X / 100 L where x is salt concentration and water remains constant so only changing thing is 10 L of solution being removed
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.