[MSK931]

The well-preserved remains of now extinct wooly mammoths are entombed in the permafrost lands of Siberia. Scientists have conducted carbon dating experiments on plan debris found in the stomachs of the mammoths. The C-14 activity of the youngest mammoths was measured at 3 disintegrations per minute per gram of carbon. How many years ago did the Siberian mommoths become extinct.

What I have so far:

3 = log15.3 - 0.301 t/5760

I can't seem to get the numbers correct. Not sure it it is my order of opperations or if I have other numbers wrong. Some advice please?