Please type your questions. I don't think anyone will want to help you this way.
in the first line
"given: ...."
there's a typo. The first = obviously should be a multiplication.
Your answer and the books answer do NOT appear to be exactly equivalent. Your answer looks more correct. The book appears less correct. This is the problem when part of the answer has been rounded to a certain decimal approximation (in the case of the book, 1 decimal place) ....