Sean is conducting an experiment with an isotope of a particular element that has a half-life of 4 hours. he begins with a sample of the isotope with a mass of 92 grams. he then measures the mass of the object every hour. what is the approximate mass of the sample after 20 hours?

Thats where they was ported and the fields that noone really knew much about needed tended, so they put slaves out there do free work and huge profits and so on the north decided to hold its own and was more different way of survival did not have same climate conditions to afford protecting slaves from winter so expenses be diff from south

(4,0) (0,-1) is an x-intercept