Iridium-192 is an isotope of iridium and has a half life of 73.83 days. if a laboratory experiment begins with 100 grams of iridium-192, the number of grams, a, of iridium-192 present after t days would be a= 100(1/2)^t/73.83. which equation approximates the amount of iridium-192 present after t days?

Cameron made 1 loaf of bread. his family ate 4/6 of the loaf of bread. how much of the loaf of bread remains? /

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.