Ayuda plis es para hoy.​

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz