The radius r of the nucleus of an atom of mass number A is r = 1.2A 1/3thermometers. Find A if r = 4.8 femtometers

Need on this one asap im almost done with this subject

Louis wants to carpet the rectangular floor of his basement. the basement has an area of 864 square feet. the width of the basement is 2/3 it's length. what is the length of louis's basement

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?