A smoke detector system uses two devices, A and B. If smoke is present the probability that it will be detected by device A is 0.95; by device B is 0.98; and by both devices, 0.94. If smoke is present, find the probability that the smoke will be detected by device A or device B or both devices.

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

Two models of the same compound are shown. in what way is model b better than model a? model b shows the types of elements in the compound, but model a does not. model b shows the three-dimensional shape of the molecule, but model a does not. model b shows how the atoms in the molecule are connected, but model a does not. model b shows the number of atoms of each element in the molecule, but model a does not

Asimple electrochemical cell contains two electrodes.