On questions 11 and 15 add and simplify if possible

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.

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 .

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?