
notice above... we use the decimal format for the percentage, thus 20% is really just 20/100, 40% is 40/100 and so on.
so.. whatever "x" and "y" amounts are, we know they have to add up to 60 Liters, that is x+y = 60
and whatever the concentration amount of each is, it must add up to (60)(0.40), that is 0.20x+0.50y=(60)(0.40)
thus

solve for "x", to see how much of the 20% solution will be needed
what about "y"? well, y = 60 - x
Answer: 18.84
Step-by-step explanation:
The equation that has the same solution as
is: C.
<h3>How to Solve Equations having Exponents</h3>
- To solve such, simplify the bases so that the base on the right equals the base on the left.
- Then solve the equation for the variable.
Given:

- The bases will cancel out
2x - 5 = 3
2x = 3 + 5
2x = 8
x = 4
The solution of
is 4.
Thus:

Therefore the equation that has the same solution as
is: C.
Learn more about equations with exponents on:
brainly.com/question/11832081
It takes 3 pumps 16 hours to empty a tank
Meaning it takes 48 hours for one pump by its self
So if there are 4 pumps
48/4 it would take them 12 hours
They would need to work 12 hours to do it in 1 day