we know that
Unit Rate is the ratio of two measurements in which the second term is \(1\)
we have
\(2\frac{1}{2}\ liters=\frac{2*2+1}{2}=\frac{5}{2}\ liters\)
so
Corey bought \(\frac{5}{2}\ liters\) of paint for \(\$60\)
by proportion
Find the cost of one liter of paint
\(\frac{60}{(5/2)}\frac{\$}{liters}=\frac{x}{1}\frac{\$}{liters} \\ \\x*\frac{5}{2}=60\\ \\ x=2*60/5\\ \\x=\$24\)
therefore
the answer is
the cost per liter of the paint is equal to \(24\frac{\$}{liter}\)
