Respuesta :
The inequality that models the given situation is;
3 + x/10 + x ≥ 8/10
The situation being referred to in the question is;
The company president sets a goal that the percentage of working phones must increase from 30% to at least 80% by the end of the day
30% simply means 3 out of 10 phones are working. This means that if the additional phones coming in are x, it means that, available phones are now 10 + x and working phones will be 3 + x to achieve at least 80% by end of the day.
80% is also written as 8 out of 10 phones.
Thus, inequality that models the situation is;
3 + x/10 + x ≥ 8/10
Read more about inequalities at; https://brainly.com/question/25275758
