Me out.
total cholesterol levels from 190 up to 240 milligrams per deciliter, including 190 and not including 240, are considered borderline. letting x represent a patient's total blood cholesterol level, write an inequality that describes the ranges corresponding to the borderline of total blood cholesterol. this data is fictitious.
choose the correct inequality below.
a. 190 < x ≤ 240
b. 190 ≤ x < 240
c. 190 ≤ x ≤ 240
d. 190 < x < 240

To interpret inequalities like these, split the inequality into two parts.
For example, take choice (A).
A. 190< x <= 240
first read 190<x  that means x is greater than 190 (but cannot be equal to).
Notice that x is on the "wider" side of the sign.
Then read x<=240, this means that x is less than, or equal to 240, since x is on the small part of the inequality sign, and the extra line makes the equality.
So, together, choice A is interpreted as
x can take values from 190 to 240, excluding 190, but including 240.

Based on this, you can attempt to find the correct choice.