<p>There are isotopes that are indefinitely stable, while some are radioactive and decay. As time passes by, the number of present radioactive isotopes will continue to decrease, as will the level of radioactivity. An aspect of this decay is what we call the half-life.</p>
McDonald's is the most significant string of hamburgers fast food restaurant on earth. The business's headquarter near Oak brook, U. S and lllinois. It portion more than 58000 customers daily in the world. Moreover McDonald's is run by either a franchisee or the corporation itself.
The company was founded in 1940 as restaurant by two brothers Richard and Maurice in San Bernardino, California. It found in 119 countries and Company also manages over 31, 000 restaurants in the worldwide and also using the more than 1. 5 million people in the world. Company start the divesting itself of other string and it experienced acquired through the 1990s. The business start the Drive-Thru to get the orders easily and it first presented in Arizona in 1975 for following the business lead in other fast food chains. Other more change in company is starting the McCafe.