[tex]1) \\ 7,5; \;\;7,53;\;\; 7,54; \;\;7,55; \;\; 7,6 \\ \\ 2a) \\ \\ 47,503 = \frac{17503}{ 10^{n}} \\ \\ 10^{n}=\frac{17503}{47,503} \\ \\ 10^{n}=1000 \\ 10^{n}=10^{3} \\ =>\;\;\;n=3 \\ \\ 2b) \\ 9,68= \frac{n}{ 10^{2} } \\ n=9,68 * 10^{2}=9,68*100 = 968[/tex]