A recent survey found that 80 % of all adults over 50 wear glasses for driving. In a random sample of 20 adults over 50, what is the mean and standard deviation of those that wear glasses? Round the answers to the nearest hundredth.

Ineed big ! the cost of a school banquet is $25 plus $15 for each person attending. create a table, sketch the graph, and write an equation in slope-intercept and point-slope form that gives total cost as a function of the number of people attending. what is the cost for 77 people?