Pleeease help will give brainliest

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.

Its worth 10000000 points need asap if you answer correctly ill mark brainliest

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.