What is Evaluate 3(4 - 2)2

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.

Which of the following contains a variable?

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost