The estimated attendance for Live 8, a worldwide free concert held in July 2005, was 1.8 million people, including figures near 800,000 in Philadelphia, 300,000 in Paris, and 200,000 in Rome and Berlin.  Do concert officials really count all those in attendance?  How do you suppose these figures are produced? How accurate can these estimates be?​

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?