If the radius of a clock is 5 inches, what is the distance around the edge of the clock between the 2 and the 5, to the nearest hundredth of an inch?

Idon’t understand this but 90

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.