There are 3785 ml in 1 gallon. there are 4 quarts in 1 gallon. how many ml are in a quart

Ineed i do not understand i'm only 8

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

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.