Use inequality notation and interval notation to describe the set. The annual rate of inflation r is expected to be at least 4% but no more than 9%. A)Inequality : 4% ≤ r ≤ 9% Interval : [4, 9] B)Inequality : 4%

Question

Use inequality notation and interval notation to describe the set. The annual rate of inflation r is expected to be at least 4% but no more than 9%. A)Inequality : 4% ≤ r ≤ 9% Interval : [4, 9] B)Inequality : 4% < r ≤ 9% Interval : [4, 9] C)Inequality : 4% < r < 9% Interval : [4, 9] D)Inequality : 4% ≤ r < 9% Interval : [4, 9] E)Inequality : 4% > r > 9% Interval : [4, 9]

Quizplus · Accepted Answer

The inequality should include both the lower and upper limits, so it should be "4% ≤ r ≤ 9%". The interval notation should include both endpoints as well and be represented as "[4, 9]". Therefore, option A is the correct answer.

Use Inequality Notation and Interval Notation to Describe the Set