What is 72.5÷10³ plsss help im confused​

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.

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Find the value of the combination. 5 c 5