Help me please stuck on this

Plz me plz i will give a brain just plz

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%