Answer:
see the explanation
Step-by-step explanation:
we know that
Alex made 4 quarts of lemonade using 1/3 cup of sugar
so
using proportion
Find out the amount of sugar needed to make 1 quart of lemonade
Let
x ----> the amount of sugar needed in cups
[tex]\frac{4}{(1/3)}\ \frac{quarts\ lemonade}{cups\ of\ sugar}=\frac{1}{x}\ \frac{quart\ lemonade}{cups\ of\ sugar}\\\\x=(1/3)/4\\\\x=\frac{1}{12}\ cups\ of\ sugar[/tex]