4.6 is the correct answer. Hope I helped:)
Answer:
B
Step-by-step explanation:
Find answer showing detailed workings in the image
You may recall that you can't take the square root of a negative number (if you want a real number). So, the area under the square root, also known as the radicand, must be zero or positive. This is how we restrict the domain.
We write the inequality

.
B
Answer:
it means y
its just another way of saying it