Question 97020
Distance=speed*time
d=st t=d/s
{{{(2.29*10^11)/(3*10^8)=7.63*10^2}}}
How we got 10^2. when we divide 10^11 by 10^8 we subtract the powers to get 10^3. 
2.29/3=.763...
we move the decimal point to the right 1 space giving 7.63...
we decrease the power of 10^3 to 10^2 to account for moving the decimal point.
Ed