Answer:
1.68 pints
Explanation:
First you need to determine how much blue paint she used, then you can determine how much white paint she used. :)
4/5 of 8.4:
4/5 * 8.4 = 6.72 pints
Now we can determine how many pints of white paint she used by subtracting 6.72 from 8.4:
8.4 - 6.72 = 1.68
So she used 1.68 pints of white paint. :) Hope this helped!