SOLUTION: Hi, I need someone's help please. I keep getting 94.724 for my answer and the actual answer is 87 decibels. What am I doing wrong? I have included my work as well.
The sound
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The sound
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Question 255350: Hi, I need someone's help please. I keep getting 94.724 for my answer and the actual answer is 87 decibels. What am I doing wrong? I have included my work as well.
The sound produced by a jet engine was measured at a distance of 100 m in all directions. The loudness d of the sound (in decibels) was found to be d=70.0+30.0cos0 , where the line 0degrees was directed in front of the engine. Calculate d for 0=34.5degrees.
d=70.0+30.0cos(34.5)
d=70.0+24.724
d=94.724 Answer by richwmiller(17219) (Show Source):
