The pH scale measures how acidic or basic a substance is. Lemon juice is said to have a pH of less than 4 and greater than 1.5. Model the normal range of pH values of lemon juice, using a compound inequality. 1.5 > x > 4 1.5 < x < 4 1.5 ≤ x ≤ 4 1.5 ≥ x ≥ 4

Let's say x is J because it's Lemon Juice.It's said that the pH of J is less than 4 so: pH(J) < 4 and pH(J) is greater than 1.5 so: pH(J) > 1.5Now we can construct:[tex]1.5 < pH(J) \wedge pH(J) < 4[/tex]Or simply:[tex]1.5 < pH(J) < 4[/tex]We can also write this with an interval:[tex]pH(J)\in(1.5, 4)[/tex]Hope this helps.r3t40