Ellis's backyard has a 6.25 by 6.25m patio. She would like to build a 1.5m wide extension around 3 sides of the patio, as figure shows. She will buy a 0.25 by 0.25m tiles that come 25 to a package. How many packages does Ellis need to buy to build the extension?

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.