PDF chapter test TRY NOW

Write in expanded form using exponentials:
 
(i) \( (3 \times 10^{4}) + (7 \times 10^{3}) + (6 \times 10^{2}) + (5 \times 10^{1}) + (4 \times 10^{0}) =\)
 
 
(ii) \((4 \times 10^{2}) + (0 \times 10^{1}) + (7 \times 10^{0}) =\)