Need help FAST please NO LINKS
Mark BRAINLLEST to whoever gets it right

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.

In angle pqr find the measure of

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?