Evaluate the iterated integral. $$ \int\limits_0^{2\pi}\int\limits_0^y \int\limits_0^x {\color{red}9} \cos(x+y+z)\,dz\,dx\,dy $$

(c) a vine called the mile-a-minute weed is known for growing at a very fast rate. it can grow up to 0.5 ft per day. how fast in inches per hour can the mile-a-minute weed grow up to? show your work using the correct conversion factors.