[" 2.Express the following numbers in usual form."],[[" (i) "3.02times10^(-6)," (ii) "4.5times10^(4)," (ii) ",3times10^(-8)],[" (iv) "1.0001times10^(9)," (v) "5.8times10^(12)," (vi) "3.61492times10^(6)]]