A bone fragment was found from an elk which had died 40 years before. What percent of Pb-210 remains? The half-life if Pb-210 is 22 years.

What are the coordinates of the hole in the graph of the function f(x) ? f(x)=x2−9x−3 enter your answer in the boxes.

Two lines parallel to a third line are parallel to each other. always sometimes or never

Quadrilateral ghjk has vertices g(2, 3), h(8, 2), j(6, 8), and k(3, 6). it is transformed according to the rule t(–4, –5). what are the coordinates of g”? (–7, 3) (–2, 2) (–1, –7) (2, –2)