The half-life of Radium-226 is 1590 years. If a sample contains 400 mg, how many mg will remain after 1000 years? Give your answer accurate to 2 decimal places.

What is the point-slope form of the equation for the line with a slope of -2 that passes through (1,4)?

Compare the subtraction problems 6/8 - 5/8 = 1/8 and 6/9 - 7/9 = 1/9 why is the answer to the first problem positive and the answer to the second problem negative

Question: a) does the given set of points represent a linear function? how do you know? b) assume that the point (-2,4) lies on the graph of a line. what y-values could complete this set of ordered pairs that lie on the same line: (- (hint: there are several correct answ