Question 96661
Put a whole number and then a decimal point. For every place that you would have to move the decimal point to the right to get the original number add 1 more to the exponent. 
If you have to move the decimal point to the left then the exponent is negative but the procedure is the same.
a. {{{8*10^8m}}}
b. {{{1.5*10^-3kg}}}
c. {{{6.002*10^5L}}}
I'll leave the last 3 up to you.
Ed