Answers: 3
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 15:30
The function ฦ is defined by ฦ(x) = (x + 3)(x + 1). the graph of ฦ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ฦ?
Answers: 2
Mathematics, 21.06.2019 18:00
14. (05.02 lc) what is the value of y in the solution to the following system of equations? (5 points) 2x + y = โ4 5x + 3y = โ6
Answers: 1
Is one half percent equal to 50%?...
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