they closed one in durham,nc where i live
The stores that sell replacement shelves for computer workstation under $40 are Target, London Drugs, Canadian Tire, Home Depot, Super Store and many more.
You can get padding to go under your table on hard wood floors at office supply stores. There are stores like Office Depot, and Staples that carry these. You could also check a furniture store.
Under cabinet lighting can be purchased at your local home improvement stores like Home Depot, Lowe's etc. You can also purchase them from online retailers like Amazon or eBay.
One can purchase under counter lighting at Home Depot and Lowes. These tow stores are the world wide leader in supplying common household items and accessories.
No. A number cannot be closed under addition: only a set can be closed. The set of rational numbers is closed under addition.
The set of even numbers is closed under addition, the set of odd numbers is not.
Based on Home Depot's website they do sell outdoor patio heaters under two hundred dollars. http://www.homedepot.com/webapp/wcs/stores/servlet/Search?keyword=patio+outdoor+heater&langId=-1&storeId=10051&catalogId=10053
Quite simply, they are closed under addition. No "when".
You can buy under sink water filters from a pluming supply distributor. Many home improvement stores like Home Depot will carry them either in the store or on their web sites.
The numbers are not closed under addition because whole numbers, even integers, and natural numbers are closed.
Yes they are closed under multiplication, addition, and subtraction.
Yes. They are closed under addition, subtraction, multiplication. The rational numbers WITHOUT ZERO are closed under division.