In a club there are four interest groups sports music gymnastics

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.

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.

Which image (a’ b’ c’ d’) of abcd cannot he produced using only reflections ?