What is the simplified form of 2160*8assume

What is sin 7x/4 ? i need on this urgent trig

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5