Workings/calculations 2.1.1
121
3
8
Х
144
27
2.1.2 -19 +(-6)-(-25)
2.1.3
5(-2+5)
[7-2(1+3)]
2.1.4 (V-27 - V8 )(5) + 25
2.1.5 73 -(-3)(-3)
2.2
Determine a number that lies exactly half way between the two given
numbers on the a number line: -2,4 and 1,7
GRAND TOTAL​

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function.a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.