The half-life of a radioactive kind of barium is 3 minutes. How much will be left after 6 minutes, if you start with 80 grams of it?

Which system of linear inequalities is represented by the graph?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250