Z_ENGR_213_Summer_2018.40055084.Assignment_4.pdf

# Is four times the y coordinate of p what is the

• Homework Help
• 3

This preview shows page 2 - 3 out of 3 pages.

is four times the y -coordinate of P . What is the equation of the curve? y ( x ) = Answer(s) submitted: 9 eˆ(4x) (correct) 8. (1 point) A tank contains 2920 L of pure water. Solution that contains 0 . 07 kg of sugar per liter enters the tank at the rate 7 L/min, and is thoroughly mixed into it. The new solution drains out of the tank at the same rate. (a) How much sugar is in the tank at the begining? y ( 0 ) = (kg) (b) Find the amount of sugar after t minutes. y ( t ) = (kg) (c) As t becomes large, what value is y ( t ) approaching ? In other words, calculate the following limit. lim t y ( t ) = (kg) Answer(s) submitted: 0 1022/5(1 - eˆ(-7t/2920)) 1022/5 (correct) 9. (1 point) A tank contains 70 kg of salt and 1000 L of water. A solution of a concentration 0 . 035 kg of salt per liter enters a tank at the rate 9 L/min. The solution is mixed and drains from the tank at the same rate. a.) What is the concentration of our solution in the tank initially? concentration = (kg/L) b.) Find the amount of salt in the tank after 2 hours. amount = (kg) c.) Find the concentration of salt in the solution in the tank as time approaches infinity. concentration = (kg/L) Answer(s) submitted: 0.07 46.8858434 0.035 (correct) 10. (1 point) A tank contains 1000L of brine with 20kg of dissolved salt. Pure water enters the tank at a rate of 25L/min . The solution is kept thoroughly mixed and drains from the tank at the same rate. Answer the following questions.

Subscribe to view the full document.

• Fall '15
• VASTITAS
• It, Kilogram, Mile, Acre

{[ snackBarMessage ]}

###### "Before using Course Hero my grade was at 78%. By the end of the semester my grade was at 90%. I could not have done it without all the class material I found."
— Christopher R., University of Rhode Island '15, Course Hero Intern

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern