How many places do you need to move the decimal if you multiply 0.2 x 0.2 ? Explain.

none.

Step-by-step explanation:

if you did 0.2*0.2 you would ignore the decimal places for now and just multiply the numbers together:

   0.2

x   0.2

          04

        + 000

      040

Then, you would count the how many numbers are behind the decimals in the multiplication, which is two. then from your answer (040) you would count over two decimal places and put the decimal there. so, in this case the answer would be 0.40 or 0.4. furthermore, the decimal place would not move at all because the numbers you are multiplying are both the same decimal places.

b) well because you get well

use formula for the circle a=3.14

step-by-step explanation: