Given:
the plant food requires 5 and 1/2 gallons of water
The measuring container has marks for only pints
So, we need to convert from gallon to pints
1 gallon = 8 pints
So, 5 1/2 gallons =
[tex]5\frac{1}{2}\cdot8=\frac{11}{2}\cdot8=44\text{ pints}[/tex]so, She will use 44 pints of water.