At an intersection the red light times are normally distributed with a mean time of three minutes and standard deviation of 0.25 minutes. Approximately what percentage of red lights last between 2.5 and 3.5 minutes

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 .