Answer:
[tex]\text{ Anna can knit 2 scarves in 4 hours.}[/tex]Step-by-step explanation:
This situation can be solved by proportional relationships if Anna can knit a scarf in one and two-thirds hours:
[tex]\frac{1}{1\frac{2}{3}}=\frac{x}{4}[/tex]Use cross multiplication and solve for x.
[tex]\begin{gathered} 4=\frac{3+2}{3}\cdot x \\ 4=\frac{5}{3}x \\ 12=5x \\ x=\frac{12}{5}\text{ }\approx2 \end{gathered}[/tex]