HELP PLEASE The graph below shows the radioactive decay of
rubidium-87.
Number of Half-lives
What percentage of rubidium-87 atoms will be left
after four half lives?
(1) 25.0%,
13) 6.25%
(2) 12.5
(4) 3.125%

Abody cell has been growing and at synthesis proteins.in the nucleus of this body cell,dna replication is taking place. and a copy of the cells genetic material is copied.which of the following is the best conclusion you can make about the life cycle of this cell ? a) the cell is ready to undergo mitosis.and a chemical signal will send the cell to prophase b)the cell is undergoing meiosis and will cross over the genetic material next c)the cell is in the s phase of interphase and will move next to the g2 phase d) the cell is in the g2 phase of the interphase and is ready to begin diving