University:
College Entrance Preparation
Course:
ACT Preparation (Mathematics)
Academic year:

2021
Views:

82

Pages:

2
Author:

Arielle Armstrong

Name . Date Exponential Decay (Half-life) 1 2 where a = initial amount x = number of half-lives time - half life y - remaining Solve each problem. 1 , There are 10 grams of Curium-245 which has a half-iife of 9,300 years. How many grams will remain after 37,200 years? 2. There are 80 grams of Cobalt-58 which have a half-life of 71 days How many grams will remain after 21, 3 days? 3. The haif-iife of Rhodium-105 is 1.5 days. If there are initially 7500 grams of this isotope, how many grams would remain after 30 days? TV 1500 OOlT a, 4. Two hundred' ten years ago there were 132,000 grams of Cesium-137. How much is there today? The half-life of Cesium is 30 years, in a nuclear reaction, 150 grams of Plutonium-239 are produced. How many grams would remain after one million years? The half-life of Plutonium-239 is 24,400 years. 6, Using carbon dating, scientists can determine how old a fossil is by how much Carbon-14 is present. If an average animal carcass contains 1 gram of Carbon-14, how old is a fossil with 0.0625 grams of Carbon-14? The half-life of Carbon-14j ars. Published by Instructional Fair Copyright protected. ISTXJMJ e Page 42 0-7424 1789-1 Algebra j Date _ Name Using Logarithms to Solve Bx = A Solve for x, rounding to the nearest tenth. Published by Instructional Fair. Copyright protected Page 48 0 7424-1789-1 Algebra II