The half-life of a radioactive isotope is the time it takes for quantity of the isotope to be reduced to half its initial mass. starting with 190 grams of a rafioactive isotope, how much will be left after 3 half-lives?

Which of the following is the true for f(x) = 5cos

Which expression converts 45 degree to radians

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books