Answer:

Step-by-step explanation:
Given
--- volume of tank
--- solid mass
--- outflow rate
Required
Determine the concentration at the end of 4 hours
First, calculate the amount of liquid that has been replaced at the end of the 4 hours.




This implies that, over the 4 hours; The tank has 160000 liters of liquid out of 440000 liters were replaced
Calculate the ratio of the liquid replaced.




Next, calculate the amount of solid left.




Lastly, the concentration is calculated as:


Convert L to cubic meters



Im pe\retty sure its D because they can be multiplied byt he sam enumber many tines
Answer:
10.8239 approximately 10.82 (in 2 decimal places)
Step-by-step explanation:
the steps are shown in the picture attached :))
Initial value can mean many things, but what I believe it means in this area is the value that you start with (obviously), so in the equation (y=mx+b), the initial value is the b. It is where the line intercepts the y-axis, and that is your initial value, I believe!
I hope this was helpful and answered your inquiry! If you have any further doubts or questions, please let me know so that I can help you!