Question

the inequality s greater than or equal to 90 describes the score (out of 100) required to earn an a on an assignment. explain the solution of the inequality in the real world problem. scores from 80 to 90 earn an a, scores from 90 to 1000 earn an a, scores from 90 to 100 earn an a, only a score of 90 earns an a

Answer 1

s ≥ 90 means “any score that is at least 90.” Because scores are out of 100, the realistic solution is 90 ≤ s ≤ 100 (interval [90,100]).

So the correct statement is: scores from 90 to 100 earn an A.
- "Scores from 80 to 90" is wrong (below 90).
- "Scores from 90 to 1000" is unrealistic here because scores are capped at 100.
- "Only a score of 90 earns an A" is wrong because scores higher than 90 also qualify.