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Tom [10]
3 years ago
15

Suppose that a large mixing tank initially holds 300 gallons of water is which 50 pounds of salt have been dissolved. Another br

ine solution is pumped into the tank at a rate of 3 gal/min, and when the solution is well stirred, it is then pumped out at a slower rate of 2 gal/min. If the concentration of the solution entering is 2 lb/gal, determine a differential equation for the amount of salt A(t) in the tank at time t.
Mathematics
1 answer:
Law Incorporation [45]3 years ago
3 0

Suppose that a large mixing tank initially holds 300 gallons of water is which 50 pounds of salt have been dissolved. Another brine solution is pumped into the tank at a rate of 3 gal/min, and when the solution is well stirred, it is then pumped out at a slower rate of 2 gal/min. If the concentration of the solution entering is 2 lb/gal, determine a differential equation for the amount of salt A(t) in the tank at time t.

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Given f(x)=3x+1, solve for x when f(x)=7
charle [14.2K]

Answer:

X = 22

Step-by-step explanation:

f(x) = 3x + 1

f(7) = 3(7) + 1

= 21 + 1

= 22

3 0
3 years ago
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Write an equation of a line in slope intercept form that is perpendicular to the line 2x -3y = 12 and passes through the point (
Scilla [17]

Answer:

The equation of the line would be y = -3/2x + 9

Step-by-step explanation:

In order to solve this, start by finding the slope of the original line. You can do this by solving for y.

2x - 3y = 12

-3y = -2x + 12

y = 2/3x - 4

Now that we have a slope of 2/3, we know that the perpendicular slope is -3/2 (since perpendicular lines have opposite and reciprocal slopes). We can use this and the new point in point-slope form to find the equation.

y - y1 = m(x - x1)

y - 6 = -3/2(x - 2)

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4 0
3 years ago
What is the area of polygon LMN? <br><br> A. 50<br> B. 60<br> C. 65<br> D. 70<br> E.80
Verdich [7]

Answer:

c:65

Step-by-step explanation:

The area of a triangle can be found almost the same way as a sqaure L*W (Length times width). Except the area of a triangle is one half that of a square, so it is \frac{1}{2}L*W. The length is 13 and the width is 10, so 13*10=130, than 1/2 that is 65.

4 0
3 years ago
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Answer with explanation please! tysvm!
Aleksandr-060686 [28]

Answer:

c

Step-by-step explanation:

6 X 2 = 12 +5 = 17

6 0
2 years ago
What is the answer to this problem?
Vladimir [108]
Volume of cone = (pi/3)r^2h
Volume of hemisphere = (1/2) (4pi/3)r^3

we are given r=6/2=3cm, h(cone)=8 cm,
so total volume
=(pi/3)r^2h + (1/2)(4pi/3)r^3
=(pi/3)*3^2*8 + (1/2)(4pi/3)*3^3
=24pi + 18pi
=42pi cm^3
=131.9 cm^3 (approx.)
7 0
3 years ago
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