Mathematics College

Room's volume is 600 m^3. There is 800 ppm (parts per million) of CO2 in the room.
Fresh air, with the CO2 concentration of 400 ppm starts flowing into the room at the rate of 40 m^3/min. The pressure in the room is constant, so an equal amount of stale air flows out as fresh air flows in, and the CO2 is evenly distributed.
a) Form the differential equation for the amount of CO2 in the room.
b) Solve this differential equation
c) What is the CO2 concentration of the room after fresh air has been flowing in for 30 minutes?

Answers

Answer 1

Answer: C

Step-by-step explanation: Hope this help :D

Related Questions

URGENT JUST THE FIRST QUESTION

Answers

Step-by-step explanation:

gradient=3/3=1

that is the answer

Solve for y: 42/10 = 21/y

Answers

Answer:

Y = 5

Step-by-step explanation:

Correct answer: y = 5

By cross multiplication, you multiply 21 × 10, which is 210. Then, you divide 210 by 42, which is 5.

Rectangle ABCDA has a perimeter of 54 Inches and a length that is twice the width. Which equation
A.54-2W
B.54=3w
C.54=5w
D.54-6w​

Answers

Answer:

54 = 6x

Step-by-step explanation:

if Austin burns 120 calories per 30 minutes of weight training how many calories would he burn in 10 minutes?

please help I have a test in 1 hour and I need to know this by then!

Answers

Answer:

40 calories per 10 min

Step-by-step explanation:

Because 30 divided by 3 is 10 and 120 divided by 3 is 40

To the nearest whole number, what is the distance
between the points M(-5, 7) and L( 9, 12)?

Answers

Answer:

point m is -5;7 but point l is 9;12

Step-by-step explanation:

m there is negative but l is positive

What is 35% of $2,195.73

Answers

768.51 dollars should be your answer it is 2195.73 * 0.35

Answer:

768.51

Step-by-step explanation:

To find 35% change the percentage to a decimal (.35)

Then multiply the original amount by .35

2195.73 *.35

768.5055

Since this is money, we round to the nearest cent

768.51

Whoever answers I’ll mark brainliest

Answers

Answer:

Right Triangle.

Step-by-step explanation:

A right triangle always has a 90 degree angle.

Answer:Right angle

Step-by-step explanation:the box down there signals its a 90 degree angle

how do i write the word form and the expanded form for 3.4 and 2.51

Answers

Answer:

(3×1)+(4/10) & two and fifty-one hundredths

Step-by-step explanation:

In order to write a decimal in expanded form you need to create a equation that equals the decimal you are trying to expand, and for writing decimal in word form you need to remember the names of place values.

1. 3.4

[tex]3.4=(3\times`1)+(\frac{4}{10} )[/tex]

2.2.51

two and fifty-one hundredths

Hope this helps.

The volume of a rectangular prism is
represented by the expression x3 + 5x2 - 8x -
48 If the length is (x – 3) and the height and
width are equal, what is the width of the prism?
(x + 4)
(x-4)
(x - 2)
(x + 2)
plsss hurry

Answers

Answer:

[tex]x+4[/tex]

Step-by-step explanation:

This question is essentially asking: [tex]p(x)^2*(x-3)=x^3+5x^2-8x-48[/tex]. Find [tex]p(x)[/tex].

The left hand side can be factored into [tex](x-3)(x+4)^2[/tex] by the rational root theorem and polynomial division.

We can then divide both sides of the equation to get [tex]p(x)^2=(x+4)^2[/tex].

Finally, we take the square root of both sides to obtain [tex]p(x)=x+4[/tex].

So, the answer is [tex]\boxed{x+4}[/tex]

Which table represents a linear function? Mark this and return Save and Exit Next Submit

Answers

Answer:

The first table because the y side is increasing at the same rate . the rate is 4

The recommended calcium intake for men and women is about 1.2 grams per day.
A glass of milk contains about 0.27 gram of calcium. If a man drinks 3 glasses of milk,
how much additional calcium does he need from other food sources?

Answers

Answer:

0.39

Step-by-step explanation:

0.27 TIMES 3 is 0.60+0.21=0.81 then 1.2-0.81=0.39

if you dont give me brainliest i will find and eat your soul from a milk jar :D

Write the point slope form of a line that passes through (1,-5) and is perpendicular to a line with a slope of 1

Answers

Answer:

y + 5 = -1 (x - 1)

Step-by-step explanation:

y = -1

y + 5 = -1 (x - 1)

Rewrite 2/9 + 5/12 with a common denominator

Answers

8/36 and 15/36,, common factor is 36.

36 divided by 9 times 2 is 8
36 divided by 12 times 5 is 15

Write the scale without units: 1 in:9 yd

Answers

Answer:

1:9

Step-by-step explanation:

that's how you write scale

Polynomials

Multiply (2x - 3)(7x – 4)

Answers

Answer:

(2x-3)(7x-4)

2x(7x-4)-3(7x-4)

14x²-8x+21+12

14x²-8x+33

Answer:

14 x square - 29x + 12

Step-by-step explanation:

(2x - 3)(7x – 4)

14x squared - 8x- 21x + 12

14 x square - 29x + 12

The expression: 4xy – 2y(x + 1) can be simplified to ​

Answers

Answer:

2. 2xy-2y

Step-by-step explanation:

4xy-2y(x+1)=4xy-2xy-2y

=2xy-2y

jeweler needs exactly 19,000 beads to make jewelry.
He buys 48 boxes of beads. Each box has 400 beads.
He completes the calculations below and concludes that he has bought enough boxes of beads to make all of the jewelry.

48
×
400
=
(
40
×
400
)
+
(
8
×
400
)
=
16
,
000
+
3
,
200
=
19
,
200

Answers

19,200
Yes it’s correct

Answer:

A is the correct answer..

i got this correct on my test

q(x)= 1/2x - 3; q(x) =-4. Find the value of x

Answers

Answer:

[tex]q(x) =-5[/tex]

Step-by-step explanation:

I am solving this using Function Notation.

We are given:

[tex]q(x)= \frac{1}{2}x - 3[/tex]

While we are to find:

[tex]q(x) =-4[/tex]

In Function Notation, replace all the "[tex]x[/tex]" you see with the value you are given.

So, in this case,

[tex]q(x)= \frac{1}{2}x - 3\\\\=\frac{1}{2}x - 3[/tex]

Would become

[tex]q(x)= \frac{1}{2}x - 3\\\\=\frac{1}{2}(-4) - 3[/tex]

Now we can solve.

[tex]\frac{1}{2}(-4) - 3[/tex]

Use PEMDAS; Parenthesis first;

[tex]\frac{1}{2}(-\frac{4}{1})[/tex]

Cross divide: 1 cancels 1, -4 ÷ 2 = -2

Hence, we are left with

[tex](-2) - 3[/tex]

[tex]-5[/tex]

Therefore, the value of x is -5

PLEASE HELP PLEAAE HURRY ANS NO LINKS PLEASE I REALLY NEED THE ANSWER

Answers

Answer:

-2

Step-by-step explanation:

Answer:

[tex]2 - 4 = - 2 \times ( - 5) = 10 \div 2 = 5 + 4 = 9 \times ( - 2) = - 18[/tex]

Need help fast please. Need help please.

Answers

A.
That’s the answer

What is -5 - 9 - 13 equal to?

Answers

Answer: -27

Step-by-step explanation: subtract -5 and - 9 to get -14, then subtract -13 and -14 to get -27

The equation is equal to -27

how do you write 37 divided 3 distributive porperty

Answers

Answer:

37 divided by 3 = 12.333333333.....

You can’t write it in distributive property, that only applies to multiplication.

Step-by-step explanation:

-1+3[(10-12)/(-16) ]

Answers

-5/8 is the answer

-1 + 3(-2/-16)
-1 + 3(1/8)
-1 + 3/8
-8/8 + 3/8
-5/8

I'm so confused, know the answer?​

Answers

Answer:

P = -10

5p - 8(p + 1) > 16

5(-10) - 8(-10 + 1) > 16

-50 - 8(-9) > 16

-50 + 72 > 16

22 > 16

A small theater had 8 rows of 24 chairs each. An extra 9 chairs have just been brought in. How many chairs are in the
theater now?

Answers

201 chairs in theater

Answer:

201

Step-by-step explanation:

8 x 24 is 192

another 9 chairs are added

192+9

201

simplify : (2x^3 - 10x^2 + 5x +14) / (x-2)

Answers

Basically it is (2x^2-6x-7)*(x-2)^2

When x is a nonzero integer, the sum of −10 + x is sometimes negative and sometimes positive. negaive or positive, explain your answer.

Answers

Answer: if the x is negative the answer will be positive but if -10 is the only negative it would be negative. The way I remember is if their is a even amount of negatives is will be positive if theirs a odd amount it would be negative . Hope this helps :)

Step-by-step explanation:

Help please………………………

Answers

Answer: See below

Step-by-step explanation:

1. Yes

2. No

3.No

4. Yes

5. No

6. Yes

7. No

8. No

9. Yes

In the graph below, what are all values of x
for which y = 0?
02
4
00
MA
plss hurry

Answers

The answer is positive 4

X= $25,000

1,500+.2(x-10,000)

Answers

Answer:

x-525000+0

Step-by-step explanation:

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