Write each of the following numbers in usual form:

(i) 3.74 × 10⁵

(ii) 6.912 × 10⁸

(iii) 4.1253 × 10⁷

(iv) 2.5 × 10⁴

(v) 5.17 × 10⁸

(vi) 1.679 × 10⁹

(i) 3.74 × 10⁵ = = 374 × 10^(5-2) = 374 × 10³ = 374000

(ii) 6.912 × 10⁸ = = 6912 × 10^(8-3) = 6912 × 10⁵ = 691200000

(iii) 4.1253 × 10⁷ = = 41253 × 10^(7-4) = 41253 × 10³ = 41253000

(iv) 2.5 × 10⁴ = = 25 × 10^(4-1) = 25 × 10³ = 25000

(v) 5.17 × 10⁶ = = 517 × 10^(6-2) = 517 × 10⁴ = 5170000

(vi) 1.679 × 10⁹ = = 1679 × 10^(9-3) = 1679 × 10⁶ = 1679000000