4, 5, 9, 27, 123 how do i get the next term?

a)by adding 3 to the term number, then finding the factorial of the resultb)by finding the factorial of the term number, then adding 3 to the resultc)by adding 4 to the term number, then finding the factorial of the resultd)by finding the factorial of the term number, then adding 4 to the result

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.