a) 536 = 512 (53)12 = 12512; 1124 = 112.12 = (112)12 = 12112
a: \(4^5\cdot8^7=2^{10}\cdot2^{21}=2^{31}\)
b: \(125^5\cdot25^3=5^{15}\cdot5^6=5^{21}\)
a) \(4^5\)x \(8^7\)
= \(\left(2^2\right)^5\) x \(\left(2^3\right)^7\)
= \(2^{10}\) x \(2^{21}\)
= \(2^{31}\)
b) \(125^5\) x \(25^3\)
= \(\left(5^3\right)^5\) x \(\left(5^2\right)^3\)
= \(5^{15}\) x \(5^6\)
= \(5^{21}\)