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Mila [183]
3 years ago
8

10 points help me pls

Mathematics
2 answers:
torisob [31]3 years ago
7 0
I know one of these is 27 hope that help a little bit sorry
iris [78.8K]3 years ago
5 0
77288283838828383838
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Initially, 50 pounds of salt are dissolved in a large tank holding 300 gallons of water. A brine solution with a concentration o
kirill [66]

Answer:

dA / dt = 6 - A (t) / 100

600

Step-by-step explanation:

We have to:

dA / dt = In - Out

Input = input salt concentration * input rate of brine

replacing

Inlet = 2 lb / gal * 3 gal / min = 6 lb / min

there is no build up because the inlet flow equals the outlet, so there are 300 gallons in the tank at the start

Output: salt concentration at the output * output rate of brine

replacing

Output: A (t) / 300 * 3 gal / min = A (t) / 100

Thus:

dA / dt = 6 - A (t) / 100

this would be the differential equation.

now, when time tends to infinity, we would be left with:

100 * dA / dt = 600 - A (t)

When t tends to infinity, A (t) tends to 0, therefore, the amount of salt would be 600.

4 0
3 years ago
What is the rate of change? how do you find it?
yarga [219]
In math, slope<span> is the ratio of the vertical and horizontal changes between </span>two points<span>on a surface or a line. The vertical change between </span>two points<span> is called the rise, and the horizontal change is called the run. The </span>slope<span> equals the rise divided by the run: . This simple equation is called the </span>slope formula<span>.</span>
3 0
3 years ago
Which is the solution set of the compound inequality 3.5x-10&gt;-3 and 8x-9&lt;39?
Goshia [24]
Solve the two inequalities.
3.5x-10>-3
3.5x>7
x>2

8x-9<39
8x<48
x<6

Hope it helped!
6 0
4 years ago
Read 2 more answers
a rectangular prism has a volume of 810 cubic meters. it has a length of 10 meters and a width of 9 meters. What is the height o
Ainat [17]

Answer:

The height of the prism is 9 meters

Step-by-step explanation:

* Lets describe the rectangular prism

- The rectangular prism has six rectangular faces

- Two of them are bases and the other four are side faces

- The rectangular prism has three dimensions length, width , height

- The volume of any prism = Area of the base × its height

∵ The base of the rectangular prism is a rectangle

∵ Area any rectangle = length × width

∴ The volume of the rectangular prism V = length × width × height

* Lets solve the problem

∵ The volume of the prism is 810 meter³

∵ Its length is 10 meter

∵ Its width is 9 meters

∵ V = length × width × height

- Substitute the values of the volume , the length and the width in

 the equation of V

∴ 810 = 10 × 9 × h

∴ 810 = 90 × h

- Divide both sides by 90

∴ 9 = h

∴ The height of the prism is 9 meters

6 0
3 years ago
Solve for x.<br> x+27+-12
Archy [21]
Your answer is -15..

6 0
3 years ago
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