SOLUTION: Jessica pulled the plug in her bathtub and it started to drain at a rate of L=-5T sqared-8T+120 where L represents the number of litres of water in the bathtub and T represents the
Algebra.Com
Question 186812: Jessica pulled the plug in her bathtub and it started to drain at a rate of L=-5T sqared-8T+120 where L represents the number of litres of water in the bathtub and T represents the number of minutes since the plug was pulled.
How long will it take for all of the water in the tub to drain out?
How many litres of water were in the tub originally?
my name is Chantal and I know how to find the vertex and the roots but I wasn't at school to learn these word problems. Can you help me?
The vertex is(-.8, 123.2)
The roots are -5.763869458 and 4.163869458
This is not in a text book
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Jessica pulled the plug in her bathtub and it started to drain at a rate of L=-5T sqared-8T+120 where L represents the number of litres of water in the bathtub and T represents the number of minutes since the plug was pulled.
How long will it take for all of the water in the tub to drain out?
That's at L = 0, which is the positive root you listed below,
4.1639 minutes
------------------------------
How many litres of water were in the tub originally?
At t = 0, L = 120 liters
--------------------------
my name is Chantal and I know how to find the vertex and the roots but I wasn't at school to learn these word problems. Can you help me?
The vertex is(-.8, 123.2)
The roots are -5.763869458 and 4.163869458
This is not in a text book
RELATED QUESTIONS
Barb pulled the plug in her bathtub and it started to drain. The amount of water in the... (answered by ewatrrr,jim_thompson5910)
It takes 10 min to fill a bathtub with the tap on full. It takes 15 min to drain the same (answered by ikleyn)
The perimeter of a small rectangular house is 120 yards. Carrie wrote a function B(l)... (answered by josgarithmetic,MathTherapy)
The plug is pulled from a small hot tub. The table gives the volume of water in the tub... (answered by Alan3354)
The perimeter of a small rectangular house is 120 yards. Carrie wrote a function B(l)... (answered by josgarithmetic,josmiceli)
A bathtub contains 45 gallons of water and the total weight of the tub and water is... (answered by josgarithmetic)
solve: You pull the plug from the bathtub, after 40 seconds, there are 14 gallons of... (answered by richwmiller)
A bathtub is filled with a volume of 30 litres of water. The plug is pulled out and it... (answered by ankor@dixie-net.com)
Hello, I'm completely stuck on this question and have tried to find help in my textbook... (answered by Alan3354)