Convert 120 km/h to feet per second with an explanation.

1m =3.28 feet    1km= 1000m    1km=3 280 feet

120x3 280=393 600feet/h          1h=3 600sec

393 600/3 600=109.33feet/sec

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.