Try another version of this question Box 1: Enter your answer using interval notation. Example: [2.1,5.6172)
Express the set `W = { p | p ≤ -9 or p ≥ -5 }` using interval notation.
`p in `
Use U for union to combine intervals. Example: (-oo,2] U [4,oo)
Enter DNE for an empty set. Use oo to enter Infinity. (-oo,-9] U [-5,oo)