ron-59 is a beta emitter with a half-life of 44.5 days. If a sample initially contains 144 mg of iron-59, how much iron-59 is left in the sample after 213 days?

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

What are several ways to reduce the effect of friction

What characteristics does a earthquake have