Is the square root of 128 irrational?

Itook a better photo of the question so y’all can see it i hope it’s a fine photo

Apple pie is removed from 350 degree oven. temperature of the pie t minutes after being removed id given by the function t(t)=72+268e-0.068t

Divide. write in the simplest form. 4 1/6 divided by 10