When administering CPR, when should you administer chest compressions

Ab+cd-> ad+bc is what kind of reaction

Esther works at a large hospital where she plans food service programs she monitors an records information regarding patients diets and intake and is devoloping a new meal plan that addresses several different dietary needs for many types of patients esther enjoys her work as she feelss that she is patients develop healthier habits

Hiv is inactivated in the laboratory after a few minutes of sitting at room temperature, but the flu virus is still active after sitting for several hours. what are the practical consequences of these findings? a) hiv can be transmitted more easily from person to person than the flu virusb) the flu virus can be transmitted more easily from person to person than hivc) this property of hiv makes it more likely to be a pandemic than the flu virusd) disinfecting surfaces is more important to reduce the spread of hiv than the flu