1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Strike441 [17]
3 years ago
11

A tank contains 1000L of brine with 10kg of dissolved salt. Pure water enters the tank at a rate of 25 L/min. The solution is ke

pt thoroughly mixed and drains from the tank at the same rate. How much salt is in the tank after t minutes?
Mathematics
2 answers:
Lilit [14]3 years ago
7 0

Answer:

its 5000kg

Step-by-step explanation:

KATRIN_1 [288]3 years ago
4 0

Answer:

(a) 5000 kilos

Step-by-step explanation:

If  is the amount of salt (in kg) after  minutes, then  and the total amount of liquid in the tank remains constant at 1000 L.

and

Because , we have

so

Since  is continuous, , and the right-hand side is never zero, we deduce that  is always positive.

Thus,  and

(b)

After one hour,

You might be interested in
Which geometric solids would model the tent?
aivan3 [116]

a cylinder and a cone. the cone would go on the top, and the cylinder on the bottom.

8 0
3 years ago
Read 2 more answers
The probability that any one egg is not spoiled in a carton of 6 eggs is 75%
ludmilkaskok [199]

Answer:

This might seem like an obvious thing to do, but Murphy points out that the date printed on the packaging isn't always an expiration date. A carton of eggs may not always need to be thrown out as soon as the date passes. The date is usually just an indicator of the egg's freshness.

"The expiration dates are not expiration dates. Sometimes they are, but most of the time, the printed date is a best used-by date or sell-by date," Murphy tells INSIDER. "So, that does not always mean that the eggs have gone bad. Food can be bad before the date. Eggs and other dairy products are temperature sensitive. If you left your carton of eggs out on the counter for an extended period of time, the eggs would actually go bad before the date."

Per Murphy, "bad," however, means that you shouldn't eat the egg because it has the potential to make you sick. But, eggs can still be fresh even if they have passed their sell-by or used-by date.

"The fresher an egg is, like a lot of things, the better it tastes. In terms of freshness, a company can put a sell-by date or best used-by date on the carton. There is no regulation on that. The date is a good indicator of freshness," said Murphy. "The closer you get to the date, the less fresh the eggs are going to be. But, just because you've hit that date or gone beyond it doesn't mean that the eggs are necessarily bad."

Step-by-step explanation:

The easiest way to tell whether or not a carton of eggs has gone bad is to do the float test. To conduct the float test, take one egg and place it in a bowl of room temperature water, according to Murphy. If the egg sinks to the bottom and lies flat on its side, it is still fresh. If the egg stands up on its end like it's standing up, then the egg has gone bad.

"When an egg is first laid and it's truly really fresh, it's completely full there is very little air inside. But, egg shells are porous. So, as time goes by the inside starts to evaporate and is replaced by air," said Murphy. "The amount of air in the egg depends on what happens to the egg when it is dropped into water. Generally, if an egg actually floats that's the point when an egg has gone bad."

6 0
3 years ago
Is polygon always a plane figure?
Elanso [62]
Yes, polygons are always plane figures
5 0
3 years ago
X2 - 7x + 9 =0 please leave answer in surf form and simplify ​
777dan777 [17]

Answer:

x = \frac{7}{2} ± \frac{\sqrt{13} }{2}

Step-by-step explanation:

Given

x² - 7x + 9 = 0 ( subtract 9 from both sides )

x² - 7x = - 9

Solve using the method of completing the square

add ( half the coefficient of the x- term)² to both sides

x² + 2( - \frac{7}{2} )x + \frac{49}{4} = - 9 +

(x - \frac{7}{2} )² = \frac{13}{4} ( take the square root of both sides )

x - \frac{7}{2} = ± \sqrt{\frac{13}{4} } = ± \frac{\sqrt{13} }{2} ( add

x = \frac{7}{2} ± \frac{\sqrt{13} }{2} = \frac{7+/-\sqrt{13} }{2}

4 0
3 years ago
Read 2 more answers
Andre is reviewing proportional relationships. He wants to practice using a graph that goes through a point so that each X-coord
harkovskaia [24]

Answer:

definition, an arc subtended by a central angle of some given measure has the same measure.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Derivative of the (sqrt of t/4t-3)
    15·1 answer
  • At Southside Middle School, 20% of the students play an instrument. There are 305 students. How many students play an instrument
    8·1 answer
  • Find the value of angle M. HELP ME PLEASE!!
    5·1 answer
  • The graph shows the amounts customers pay for x pounds of cheese at a deli counter. Customers pay a certain price per pound up t
    7·1 answer
  • The data represent the results for a test for a certain disease. Assume one individual from the group is randomly selected. Find
    5·1 answer
  • 7428.358146 round to nearest cent
    14·2 answers
  • HELP ASAP PLEASE
    11·2 answers
  • Choose the correct definition of an experiment from the choices below.
    11·1 answer
  • What is the approximate volume of the cone below?
    10·1 answer
  • Can someone solve this please!
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!