A certain radioactive substance has a half-life of about 2650 years. Write an equation describing the situation with the original quantity of the substance
being 200 milligrams. How much will remain after 500 years? In how many years
will there be half of the original left?

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i