Pls answer correctly :)

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Which of the following is a solution of z^6 = 64i? 2(cos105° + isin105°) 2(cos120° + isin120°) 2(cos135° + isin135°) 8(cos15° + isin15°)

How can constraints be used to model a real-world situation?