Saturn has an orbital period of 29.5 years and Uranus has an orbital period of 84.0 years. How many orbits does Saturn make for each Uranus orbit?

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.

The range would be 13 because you’re finding the difference