What fraction of a sample of 6832ge, whose half-life is about 9 months, will remain after 2.4 years?

Pls never taught i’m really confused and i rlly need

Parallelogram rstu is a rhombus. m∠r = 120° what is m∠t = 120 (what is m∠rsu? )

Anne plans to increase the prices of all the items in her store by 5%. to the nearest cent, how much will an artist save if the artist buys a canvas and a frame that each measure 24 by 36 inches before the price increase goes into effect?