A chlld on a merry-go-round takes 3,9 s
to go around once. What is hls angular
displacement during a 1.0 s tlme
Interval?

6/9 i need more characters in my answer

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.