Joe is building a fort for his little brother out of boxes. He is wondering how much room there will be inside the fort. plz don't mind my mouse :')

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 is the sum of these mixed numbers 2 1/8 + 4 3/8

Precalculus question, image attached.