I feel bad for you science is hard u know that
2.8 is the andwer because when you divide 8.40 divide 3 it is equal to 2.8
Answer:
{x\ x e U and x has a negative square root} is an empty set.
Step-by-step explanation:
If x e U, x is a negative real number, and they don't have a square root (they don't have even roots). Their square roots are complex numbers, not real ones.