First vector orthogonal<span> to ⟨−</span>3<span>,4</span>
Simply divide 3 by 0.7,

Or ≈ 4.28571 which is ≈ 4 years.
Answer:
A- control group
Since group A is tested under normal condition, it is the control group. Control group is separated from other groups so that the independent variable being tested cannot influence the result.
Answer:
I think it's 7.93725
I'm not sure if I did this correctly