The Japanese 500 yen coin has a hole in the middle what are the possible ways to calculate the difference between the distances from the outer edges and the inner edges of the coin check all that apply

The daily production of a company is modeled by the function p = -w^2 + 75w - 1200. the daily production, p, is dependent on the number of workers (w) present. if the break-even point is when p=0, what are the least and greatest number of workers the company must have present each day in order to break even? 50 points! will give brainliest!