Please help with this

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

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?