Adjacent angles whose exterior sides are opposite rays are

What is negative 3/9 times negative 2/8 ?

Me find the answer and explain the process to find the answer of the problem appreciate it : )

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!