Answer:
1.78 pints
Step-by-step explanation:
We need to find 4/5 of the total pints of paint she used, so we know how much blue paint she used. Then, we subtract that from the total pints of paint that she used.
She used 8.9 pints of both blue and white paint.
Therefore, the amount of blue paint she used is:
4 / 5 * 8.9 = 7.12 pints
The amount of white paint she used is therefore:
8.9 - 7.12 = 1.78 pints