Suppose a = {x |x ≤ −2, x ≥ 3} and b = {x | −1 ≤ x < 5}. which statement is true?
a. a ∪ b is all real numbers
b. a ∩ b = ∅
c. a' = {x | −2 ≤ x ≤ 3}
d. b ⊆ {x | x ≤ 5}

3= 3 ticks above 0

2.25= 2.25 ticks above 0

opposite of 4= 4 ticks below 0

-(-1 1/2)= 1.5 ticks above 0

<| - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - |>

- 4 0 1.5 2.25 3

-4 = 5.5 ticks below 1.5; 6.25 ticks below 2.25; 7 ticks below 3

1.5= 5.5 ticks above -4; 0.75 ticks below 2.25; 1.5 ticks below 3

2.25= 6.25 ticks above -4; 0.75 ticks above 1.5; 0.75 ticks below 3

3= 7 ticks above -4; 1.5 ticks above 1.5; 0.75 ticks above 2.25