At the beginning of an experiment, a scientist has 172 grams of radioactive goo. After 255 minutes, her sample has decayed to 2.6875 grams. What is the half-life of the goo in minutes? (Round to one decimal place) The half-life of the goo is Find a formula for G(t), the amount of goo remaining at time t. G(t) = How many grams of goo will remain after 68 minutes? (Round to one decimal places) There will be grams of goo after 68 minutes.