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Sample Questions

Sample 1:
The noise level at a music concert must be no more than 80 decibels (dB) at the edge of the property on which the concert is held. Melissa uses a decibel meter to test whether the noise level at the edge of the property is no more than 80 dB. Melissa is standing 10 feet away from the speakers and the noise level is 100 dB. The edge of the property is 70 feet away from the speakers. Every time the distance between the speakers and Melissa doubles, the noise level decreases by about 6 dB. Rafael claims that the noise level at the edge of the property is no more than 80 dB since the edge of the property is over 4 times the distance from where Melissa is standing. Explain whether Rafael is or is not correct.

Sample 2:
        
Sample 3