What can scientists learn from the rate at which radioactive elements decay?

a) the difference between molds and casts

b) the relative age of rock layers

c) a rock’s actual, or absolute, age

d) where one soil horizon ends and the next begins
! meh!

the answer is C

Explanation:

From the rate at which radioactive elements decay, the rock's actual, or absolute age can be determined. Using the half-life of the material, we cancalculate using first-degree order equation the age of the rock. The ratio of the original substance to the remaining substance is determined through the half-life.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

c) should be the answer.