Some more free points take them all I post for people to get points

Paint should be stored and mixed in an osha-approved room with all of the following, except: a) adequate ventilation b) ventilation hoods c) unshielded electrical devices d) fire extinguishers

What dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean what dose sat mean

How do you work out 21.3-8= show your working. plz