Solve for x.(round to the nearest tenth.)

17ft and 10.6ft.

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

On saturday a souvenir shop had 125 customers. sixty four percent of the costumers paid with a credit card. how many costumers paid with cash?

What is the simplified form of square root of 400 to the 100th power ?