Solve
-The Radius R of a Plastic Tube Used in Manufacturing

Solve.
-The radius r of a plastic tube used in manufacturing a child's toy must not differ from the standard s by more than 5 millimeters. The manufacturing engineers express this as |r - s| ≤5. If the standard s is 33, solve the inequality for the radius r. Express the answer in set-builder notation.

A) $\{ \mathrm { r } \mid 23 \leq \mathrm { r } \leq 28 \}$
B) $\{ \mathrm { r } \mid 28 \leq \mathrm { r } \leq 38 \}$
C) $\{ \mathrm { r } \mid \mathrm { r } \leq 28$ or $\mathrm { r } \geq 38 \}$
D) $\{ \mathrm { r } \mid \mathrm { r } \leq 23$ or $\mathrm { r } \geq 28 \}$