Compare the following numbers :
(1) 2.7 x 10 raised to the power of 12 ; 1.5 x 10 raised to the power of 8
(2) 4 x 10 raised to the power of 14 ; 3 x 10 raised to the power of 17
25 raised to the power 45 raised to the power of 3.
The relation between x, y and z where x = 81, y = 4 and z = 3 written in the exponential form is :