What is 4/2 by the power of 2 divided by 8

You can model the population of a certain city between 1955-2000 by the radical function p(x)=55,000 sqrt x-1945. using this model, in which year was the population of that city 220,000

If there are 3.281 feet in 1 meter, how many inches are in one centimeter

Rationalize the denominator- 12x/√x-10