What is the first step of adding 12.65 + 30.75?

The first step to make sure you are adding these correctly is to rewrite the problem so that they are on top of each other.  You will need to make sure the decimal points are lined up on top of each other because when you add these, you will add the place values that are the same (when adding anything together your units must be the same).  When adding with decimals, the place values will line up if you line up the decimal points.After that, add the numbers furthest to the right because that is your smallest place value.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

If the diameter is 8 than the radius is 4 because 2r or 2*radius equals the diameter. 4*2=8. 8/2=4.