Question

How many times smaller is 2 x 10^-12 than 4 x 10^-10?

Answer 1

the ratio is,

`=(4*10^(-10))/(2*10^(-12))`
`\begin{gathered} =2*10^(12-10) \\ =2*10^2 \\ =200 \end{gathered}`

so 2 x 10 ^-12 is 200 times smaller than 4 x 10 ^-10