Explain why these two are the correct answers for this translation!

Aladder that is 30 ft long needs to reach 27 ft up a building. what should the angle of the vertical be?

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.

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)