1.) A fossil is burned and the CO2 produced is captured. It produces 453 counts of radiation per gram. Under the same conditions atmospheric CO2 produces 19 277 counts. Calculate the age of the fossil.

I have the formula: Nt = N0 e^ -t(ln2)/T

Nt is the number of atoms of radioactive isotope at time t

N0 is the initial number of such atoms

T is a measure of time called the half-life.

The half-life of 14C is 5730 years.

Any help is appreciated!

2.) Earthquake A has a Richter magnitude of 5.8, while earthquake B has a Richter magnitude of 7.2. How many times more energy is radiated by earthquake B? (What is the ratio of their seismic energies?)

The given formulas are:

Mr = log A

log Es = 11.8 + 1.5 Mr

I know that Mr for earthquake A is 5.8 and 7.2 for earthquake B.

I calculated log Es for each and got 20.5 for earthquake A and 22.6 for earthquake B.
I don't know how to proceed.

o wait i answered it