Question

3- Calcule: a) 5 . 104 x 8 . 103 = b) 3 . 10-3 x 3 . 105 = c) 2,14 .1051,07.102 = d) 6,12.10-73.104 =

Answer 1

3)

$a)~\mathsf{5\times10^4\times8\times10^3=40\times10^7=4\times10^8}\\b)~\mathsf{3\times10^{-3}\times3\times10^5=9\times10^2}\\c)~\mathsf{2,14\times10^5\times1,07\times10^2=2,2898\times10^7}\\d)~\mathsf{6,12\times10^{-73}\times10^4=6,12\times10^{-69}}$