# Question #f7dcc

Oct 6, 2017

150 microliters.

#### Explanation:

This is a simple problem of Dilution. Please refer to this Answer for a nice explanation of it before proceeding.

You read it? Good, let's continue.

For this case. We have the Final Volume $\left({V}_{f}\right)$ and the Dilution Factor $\left(D F\right)$ but not the Initial Volume $\left({V}_{i}\right)$.

So this $D F = {V}_{f} / {V}_{i}$

Becomes this $4 = \frac{600}{V} _ i$

With some rearranging ${V}_{i} = \frac{600}{4}$

Which results in our answer of ${V}_{i} = 150$ microliters