Source emits sound equally in all directions
A source emits sound equally in all directions. There are no reflections of the sound. At a distance r1 from the source the sound is around 3.9 dB louder than it is at a distance r2 from the source. Find out the ratio r1/r2?
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An instant lottery game offers you probability 0.01 of winning on any one play. Plays are independent of each other. If you play three times, the probability that you win on none of your plays is regarding
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