The expression 3b plus 2.8 is equal to blank for b=4

In the diagram of circle a what is m

Which function is shown on the graph?

The table shows how many people went on a roller coaster during 3 days. sean wants to know if the total of number of people is greater than 800. how can you answer sean's question without actually computing the total? explain. friday 158 people, saturday 292 sunday 278