初学者c ++教科书不同意我在编译数学方程时得到的实际输出

Hi so the following are questions from my hw this week, I answered them in accordance with the material I found in my textbook but because we are graded extremely harsh in this class I thought I'd run them through a compiler to see if my answers were right. However when I run them in a c++ compiler I can't get the pow, ceil, or floor functions to return a floating point, they only return integers which disagrees with what my book says they should return??? I showed what my answers to the hw should be according to the book, and in parentheses what happens when i compile them.Hi so the following are questions from my hw th