Question

I need to write these in interval notation but am having a tough time .. pls help

Answer 1

Notice that:

$C\subseteq B.$

Therefore:

$\begin{gathered} B\cup C=B, \\ B\cap C=C. \end{gathered}$

Now, B and C in interval notation are:

$\begin{gathered} B=\lbrack1,\infty), \\ C=(6,\infty). \end{gathered}$

Answer:

$\begin{gathered} B\cup C=\lbrack1,\infty), \\ B\cap C=(6,\infty). \end{gathered}$