Find the domain and range f(x)=4x²+3,0<or=x<or=6

Question

 please help me find the domain and range

 

the 0≤x≤6 is throwing me off

Answer 1

0 ≤ x ≤ 6 states the restricted domain.

The range is f(0) ≤ y ≤ f(6), or y ∈ {y | 3 ≤ y ≤ 147}