Please Help. Explain if you can

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Which of the following circles have their centers in the third quadrant?