What tool is used by geologists to

help date unknown rock layers?

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.