Question 264829
equation is:


8.91 * 10^7


if you multiply by 10^0 you do not move the decimal point.


8.91 * 10^0 = 8.91 * 1 = 8.91


if you multiply by 10^1 you move the decimal point to the right 1 place.


8.91 * 10^1 = 8.91 * 10 = 89.1


if you multiply by 10^2 you move the decimal point to the right 2 places.


8.91 * 10^2 = 8.91 * 100 = 891.0


extrapolate from this to find that when you multiply by 10^7 you are moving the decimal point to the right 7 places.


8.91 * 10^7 is therefore equal to 89100000.


you move the decimal point 2 places to the right to get 891.


you then add 5 more 0's to move to the right 5 more places to get 89100000.


the total movement of the decimal places was 7 places to the right.


that's equivalent to 89,100,000.


use your calculator to confirm.