Been on this math problem for almost an hour will mark most brainly(just the bottom part)
1 answer:
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Answer:
We have to add 1.86 L of water to make the solution 7% saline.
Step-by-step explanation:
The concentration of a saline solution is given by
C(x) =
where x represents the amount of water used to dilute the solution.
We have to find how much water must be added to obtain a solution that is 7% saline.
If we see the equation we notice that as we add the value of x, the concentration of the solution decreases.
Here C(x) = 0.07
0.07 =
Rearranging,
1 + x =
1 + x = 2.86
x = 1.86 L
We have to add 1.86 L of water to make the solution 7% saline.
Answer:
can be written as the single logarithm:
Step-by-step explanation:
Start by using in both terms of the expression the property of logarithm of a power that states:
so we recognize that the factor that multiplies each logarithmic expression, can be understood as the power of the argument of the function logarithm:
Then we use the property of logarithm of a product which states that:
So now we recognize the expression:
as the logarithm of the product:
which is finally a single logarithm as requested.