Need help ;-; please

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.

If sina is 4/5 then find the value of sin3a . with explanation.

Iready kara is sorting buttons by length for a craft project the line plot shows the length of each button if kara lines up all the 3/4 inch buttons,what would be the total length