Question 21200
well, use a calculator?


if you need to do it by hand, then... 4.242x10^2 is 424.2


So {{{(424.2)/(2.1x10^(-1))}}}


424.2/2.1 is 202 so we have {{{(202)/(1x10^(-1))}}} which can be thought of as {{{(2.02x10^2)/(1x10^(-1))}}} which then becomes {{{2.02x10^3}}} which is 2020.


This is a fair bit of messing around with numbers, but is all good practice for you.


jon.