Answer:
We must add 400 ml of water.
Step-by-step explanation:
We can use the following equation:

Where:
- C(i) is the initial concentration of the solution (80%)
- C(f) is the final concentration of the solution (30%)
- V(i) is the initial volume (150 ml)
- V(f) is the final volume
Now, we just need to solve the equation for V(f).



Therefore, we must add 400 ml of water.
I hope it helps you!
The thousandths place is the 3rd digit after the decimal.
So:
47,268.56<u>8</u>593 = 47,268.569
The 3rd option is your answer
Answer:
I think this is right 50 but I don't know I am 3rd grade
Step-by-step explanation:
<h2>so tha

s my answer</h2>
Answer:

Step-by-step explanation:
I used this equation formula and just input the numbers given:

Where
P= final population
= original population
r = rate of growth
t = time
Hope this helps!