Kelly is knitting a scarf for her brother. It took her 1/3 hour to knit 3/8 foot the scarf. How fast is kelly's knitting speed in feet per hour?

11/36 is .305 repeating

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.