Plz me get the answer to these asap

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.

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?