Two marks exercise problems X — task. Mathematics State Board, Class 8.

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Find the number in standard form for the following expansions:

(i)

8 \times 10^{4} + 7 \times 10^{3} + 6 \times 10^{2} + 5 \times 10^{1} + 2 \times 1 + 4 \times 10^{- 2} + 7 \times 10^{- 4}

(ii)

5 \times 10^{3} + 5 \times 10^{1} + 5 \times 10^{- 1} + 5 \times 10^{- 3}

(iii) The radius of a hydrogen atom is \(2.5 \times 10^{11} \ m\).

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17. Two marks exercise problems X