<span>Across nearly seven million years, the human brain has tripled in size, with most of this growth occurring in the past two million years.</span>
Haha , I am. I’m trying to see if I can actually answer any of these
Setting good examples, keeping everything in order, making sure every thing stays in line, and provide work for the teachers to teach the students
If the half-life is 5 minutes, then 30 minutes is equivalent to 6 half-lives. So, after six successive half-lives, the 400 mg of the radioisotope would have a mass of 400(0.5)⁶ = 6.25 mg.
Thus, A would be the correct answer choice here.
