Suppose you want to install carpet in a room that measures 18 feet by 22 feet. the carpet you want coats $28.50 per square yard and comes only in rolls that are 12 feet wide ( and at least 100 feet long). if you allow only one seam what is that most efficient way to lay the carpet and how much will it cost?

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source:  

this seams to be a multiple choice question, state the options below.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).