Question

Depois de duas tentativas de postar, finalmente consegui, ESPM -SP

Answer 1

$N=8^{20}.5^{54}\\\\ N=(2^3)^{20}.5^{54}\\\\ N=2^{60}.5^{54}\\\\ N=2^6.2^{54}.5^{54}\\\\ N=2^6.(2.5)^{54}\\\\ N=64.(10)^{54}\\\\ N=64.10^{54}\\\\ N=6,4.10^{55}\\ N=a.10^b\\\\ Assim: a=6,4 \ e \ b=55\\ a+b=6,4+55=61,4$