SOLUTION: q(x)=x^2+9 r(x)=√x+8 Find the following. (q ∘r)(8)= (r ∘q)(8)=

(a)  (q o r )(8) = q(r(8)).


     First compute  r(8) =  =  = 4.

     Next  compute  q(r(8)) = q(4) =  = 16 + 9 = 25.



(b)  (r o q)(8) = r(q(8)).


     First compute  q(8) =  = 64+9 = 73.

     Next  compute  r(q(8)) = r(73) =  =  = 9.