The half-life a particular radioactive
substance is 10 seconds. If you started
with 100 grams of this substance, how
much of it would remain after 60
seconds?

What is the volume of the sphere shown below with a radius of 3?

What is the quadric regression equation that fits these data

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.