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Dafna1 [17]
3 years ago
7

Work out (7×10^5) ÷ (2×10^2)​

Mathematics
1 answer:
Zinaida [17]3 years ago
3 0

Answer:

<h2>3500 is the correct answer .</h2>

Step-by-step explanation:

<h3> ( 7×10^5) ÷ (2×10^2)</h3><h3 /><h3>= (7 × 100000) ÷ ( 2×100)</h3><h3 /><h3>= 700000 ÷ 200</h3>

<h3>= 3500 </h3>

Mark BRAINLIEST

Thank you ☺️☺️

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Suppose that a large mixing tank initially holds 500 gallons of water in which 50 pounds of salt have been dissolved. Another br
Lina20 [59]

Answer:

The differential equation for the amount of salt A(t) in the tank at a time  t > 0 is \frac{dA}{dt}=12 - \frac{2A(t)}{500+t}.

Step-by-step explanation:

We are given that a large mixing tank initially holds 500 gallons of water in 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.

The concentration of the solution entering is 4 lb/gal.

Firstly, as we know that the rate of change in the amount of salt with respect to time is given by;

\frac{dA}{dt}= \text{R}_i_n - \text{R}_o_u_t

where, \text{R}_i_n = concentration of salt in the inflow \times input rate of brine solution

and \text{R}_o_u_t = concentration of salt in the outflow \times outflow rate of brine solution

So, \text{R}_i_n = 4 lb/gal \times 3 gal/min = 12 lb/gal

Now, the rate of accumulation = Rate of input of solution - Rate of output of solution

                                                = 3 gal/min - 2 gal/min

                                                = 1 gal/min.

It is stated that a large mixing tank initially holds 500 gallons of water, so after t minutes it will hold (500 + t) gallons in the tank.

So, \text{R}_o_u_t = concentration of salt in the outflow \times outflow rate of brine solution

             = \frac{A(t)}{500+t} \text{ lb/gal } \times 2 \text{ gal/min} = \frac{2A(t)}{500+t} \text{ lb/min }

Now, the differential equation for the amount of salt A(t) in the tank at a time  t > 0 is given by;

= \frac{dA}{dt}=12\text{ lb/min } - \frac{2A(t)}{500+t} \text{ lb/min }

or \frac{dA}{dt}=12 - \frac{2A(t)}{500+t}.

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Can someone explain how to solve the system of equation x+y=3 by graphing?
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Answer:

its not possible


Step-by-step explanation:


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3 years ago
Math answer with work cause it need proof ASAP
Viktor [21]

Answer:

[See Below]

Step-by-step explanation:

__________________________

✦ Solve for (1*10)+(4*1)+(7*0.01)+(2*0.001):

__________________________

✦ Solve Parenthesis first:

  • (1*10)=\bold1\bold0
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  • (2*0.001)=\bold0\bold.\bold0\bold0\bold2

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✦ Add all the values together:

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So Mikayla wrote the decimal correctly.

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~<em>Hope this helps Mate. If you need anything feel free to message me.</em>

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Answer:

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Step-by-step explanation:

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