The thickness of a dime is about one millimeter, which is 0.001. Write in scientific notation

Scientific notation is

(number >1 and <10) times 10^x

so if you have 4.5 times 10^3 that means

4.5 times 1000=move the decimal place down 3 places

4500 so

0.001

it needs to be 1 times 10^x power

count the decimal places

3 places to the right

when you need to move the decimal place to the right, you multiply it by - x

so 1 times 10^-3 is the answer