Five good light bulbs and two defective ones were mixed up unknowingly. To identify the defective ones for disposal, the bulbs are tested one one by one. (a) If both defective ones are identified in the testing of the second one, what is the probability of such a ‘lucky’ break? (b) If three bulbs had to be tested to get the two defective ones, what is the probability of such an event.

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Triangle abc is reflected over the line y=x triangle abc has points (-6,-,-1) and (-5,-6) what is the c coordinate

If f(x) = 2x + 2 and g(x) = x? , what is (gºf)(2)?