Waitress and kitchen staff in a restaurant decide to share their tips. there are 8 kitchen staff and 10 waitresses. the kitchen staff received a mean average of £23 weekly and the waitress receives a mean of £28 weekly. work out the mean average of all 18 members of staff.

The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january. what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed. use 3.14 for π .