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Mathematics, 21.06.2019 13:30

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).

Answers: 1

Mathematics, 21.06.2019 19:30

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

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Mathematics, 21.06.2019 19:30

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

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Mathematics, 22.06.2019 00:40

Calculate the effective quarterly compound interest rate equivalent to a 1% of monthly compound interest rate.

Answers: 3

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