PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!

PLEASE HELP ILL GIVE BRAINLIEST EXTRA 40 POINTS DONT SKIP class=

Answer :

Answer:

the second one

scientists see how old the rock is

Answer:its radioactive nvm

Explanation:

apperantly they use radioactive to mesure the decay of the isotopes