A bone fragment has 10% of the parent Pb-210 remaining. The half-life of Pb-210 is 22 years. How old is the bone fragment?

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect

Fill in the blank 1. a rhombus is a rectangle a) always b) sometimes c) never 2. a square is a quadrilateral a) always b) sometimes c) never 3. a trapezoid is a kite a) always b) sometimes c) never 4. a quadrilateral is a kite a) always b) sometimes c) never 5. a square is a rhombus a) always b) sometimes c) never 6. a parallelogram is a rectangle a) always b) sometimes c) never