What is the approximate area of a circle with a radius of 15 ft?

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.

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x