A patient was injected with Tc-99m 12 hrs ago to complete a bone scan and 3.0 mCi remains in her blood stream. If the half life of Tc-99m is 6 hrs. How much Tc-99m was she injected with?

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.

a) the particles of the chair are strongly held together.