Rewrite the radical expression using rational exponents and simplify

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

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