Nick starts with 20 milligrams of a radioactive substance. the amount of the substance decreases by 12 each week for a number of weeks, w . he writes the expression 20(12)w to find the amount of radioactive substance remaining after w weeks. autumn starts with 1 milligram of a radioactive substance. the amount of the substance decreases by 50% each week for a number of weeks, w . she writes the expression (1-0.5)w to find the amount of radioactive substance remaining after w weeks.

The table shows a pattern of exponents. what is the pattern as the exponents decrease?

Design a number line containing five (5) points2.benin, one of the smallest countries in africa, has a total area of 43,475 square miles. the population of the country was recently estimated at 10,160,555. about 3,657,790 people live in rural areas. the country has only about 870 miles of surfaced roads. a. round off the total population to the nearest hundred thousand people. b. round off benin’s area in square miles to the nearest thousand. c. round off the number of miles of surfaced roads to the nearest ten. d. round off the number of people who live in rural areas to the nearest million.

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)