Find the length of side x in simplest radical form with a rational denominator

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Write each of the following numerals in base 10. for base twelve, t and e represent the face values ten and eleven, respectively. 114 base 5 89t base 12