Please help me these are my last questions ever for this semester please help if you answer something absurd or random to get points im reporting you so please be kind and help ill be very grate fun if you could just answer one of them please just help
I've asked this question already and no one answered it please help

What is the solution to the equation 9^(x+1) =27

Which expression is not a polynomial?

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.