Question
Perform following calculations and express results in scientific notations $($exponential notations$).$
$i. \ (2.5 \times 10^{-6}) \times (1.8 \times 10^{-7})$
$ii. \ (4.5 \times 10^{-3}) \times (1.8 \times 10^3)$
$iii. \ (8.5 \times 10^7) \times (3.5 \times 10^9)$
$i. \ (2.5 \times 10^{-6}) \times (1.8 \times 10^{-7})$
$ii. \ (4.5 \times 10^{-3}) \times (1.8 \times 10^3)$
$iii. \ (8.5 \times 10^7) \times (3.5 \times 10^9)$