Which substance would be considered a nonrenewable resource? a. fertile soil b. crops c. oil d. trees in a forest e. groundwater?

That would be Oil [OPTION C].

Whereas more crops can be planted; groundwater can be restored by rain; forests can undergo afforestation; unfertile soil can be treated; once the supply of oil has been depleted, it is very difficult to replenish.

Answerspecies;

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.