Answer
$2\frac{2}{3}\leq v\leq 6$
Work Step by Step
$2\leq0.75v\leq4.5\longrightarrow$ using the division property of inequality, divide each part by 0.75
$2\div0.75\leq0.75v\div0.75\leq4.5\div0.75\longrightarrow$ divide
$2\frac{2}{3}\leq v\leq 6$
