\(4^{15}.5^{30}=2^{30}.5^{30}=10^{30}\)
\(27^{16}:9^{10}=3^{48}:3^{20}=3^{28}\)
a) 415 x 530 = 415 x ( 52 )15
= 415 x 2515
= ( 4 x25 )15
= 10015
b) 2716 : 910 = ( 33)16 : (32)10
= 348 : 320
= 328
27^16:9^10=(3^3)^16:(3^2)^10=3^48:3^20=3^28
b) 2716:910
= (33)16: (32)10
= 348: 320
=328