Hannah's school hosted a book donation. There are 150 students at her school and they donated a total of `b` books! Hannah donated 3 times as many as the average number of books each student donated. How many books did Hannah donate?

Write your answer as an expression.

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 .