Answer:
9 pounds
Explanation:
Let x represent the number of pounds needed. We can then find x as per below;
[tex]\begin{gathered} 2\text{ pounds }\Rightarrow\text{ 100 foot} \\ x\text{ pounds }\Rightarrow\text{ 450 foot} \\ \therefore x=\frac{450\ast2}{100} \\ =\frac{900}{100} \\ \therefore x=9\text{ pounds} \end{gathered}[/tex]