Can someone help me solve this and can I have a detailed explanation because I have to answer this for a verbal test?

Given f(t) = 282 - 53 +1, determine the function value f(2). do not include f(z) = in your answer

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.

Simplify this expression. 8x 16(x + y)