They use various things like radiometric measuring where they measure things like radiation impurities that were formed over time. They also use relative dating and they measure also by seeing how many layers of different minerals have formed one over the other. They use a lot of these techniques in combination to determine the age.
Answer:
3. initial credibility
Explanation:
Initial credibility is the credibility an audience has about a speaker even before the start of his speech or the credibility a speaker has before beginning his or her speech, this is mostly based on the reputation and credentials of the speaker.
Answer: its not a household item but washing the dishes
Explanation: