Find y as a function of t if 5y′′+31y=0 y(0) Note: This particular weBWork problem can't handle complex numbers, so write your answer in torms of aines and cosines, rather than using e to a complex power. ( 1 point) Find y as a function of x if y′′′+64y′=0 y(0)=−7,y′(0)=−16,y′′(0)=64y(x)=
