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alekssr [168]
3 years ago
13

A coin weighs about 14" pounds. Find the weight of 1000 of the coins. Round your answer to

Mathematics
1 answer:
user100 [1]3 years ago
5 0

Answer:

I'm sorry I would help you I don't understand the second sentence.

Step-by-step explanation:

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A tank contains 10 liters of pure water. Saline solution with a variable concentration 5 grams of salt per liter is pumped into
algol [13]

Answer:

dQ(t)/dt = 20 - 2Q(t)/5 , Q(0) = 0

Step-by-step explanation:

The mass flow rate dQ(t)/dt = mass flowing in - mass flowing out

Since 5 g/L of salt is pumped in at a rate of 4 L/min, the mass flow in is thus 5 g/L × 4 L/min = 20 g/min.

Let Q(t) be the mass present at any time, t. The concentration at any time ,t is thus Q(t)/volume = Q(t)/10. Since water drains at a rate of 4 L/min, the mass flow out is thus, Q(t)/10 g/L × 4 L/min = 2Q(t)/5 g/min.

So, dQ(t)/dt = mass flowing in - mass flowing out

dQ(t)/dt = 20 g/min - 2Q(t)/5 g/min

Since the salt just begins to be pumped in, the initial mass of salt in the tank is zero. So Q(0) = 0

So, the initial value problem is thus

dQ(t)/dt = 20 - 2Q(t)/5 , Q(0) = 0

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2 years ago
PLEASE HELP ME GET AN A
sveticcg [70]

Answer:

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Step-by-step explanation:

6 0
3 years ago
About how many cells are in the human body?
Mrrafil [7]

I think its 30 trillion cells

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2 years ago
The slope of a line is negative for use the cordons of the labeled point to find a point-slope equation of the line.
Alexeev081 [22]
For slope m and point (x₁, y₁), the point-slope equation of the line can be written as
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You have m = -4 and (x₁, y₁) = (4, -9), so the equation of your line is
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3 years ago
Which equation represents a circle with a center at (-3,-5) and a radius of 6 units
TEA [102]

Answer:

-3x^2 - 5y^2 = 36

Step-by-step explanation:

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