What is the equation of A parabola that is concave up and has a y-intercept at 4

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.

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

What is not true about kl and mn? what is mn? (show your work)