9is multipled by the cube of a number you have to put it as a expression

Find the missing factor in exponential form 48^2=3^2 • ?

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

Given: klmn is a parallelogram m? n=3m? k, lf ? kn , ld ? nm kf=2 cm, fn=4 cm find: lf, ld