What is the value of y in the sequence below? 2, y, 18, -54, 162

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.

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?