How much of a radioactive kind of bismuth will be left after 40 minutes if you start with 72 grams and the half-life is 20 minutes?
grams?

An eight-sided die, which may or may not be a fair die, has four colors on it; you have been tossing the die for an hour and have recorded the color rolled for each toss. what is the probability you will roll a brown on your next toss of the die? express your answer as a simplified fraction or a decimal rounded to four decimal places.

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

What properties allow transformation to be used as a problem solving tool