Mark has a string that is six feet long. if he cuts it in half and then cuts each half in half, how long will each piece be?

Assume that a population of 50 individuals has the following numbers of genotypes for a gene with two alleles, b and b: bb = 30, bb = 10, and bb = 10. calculate the frequencies of the two alleles in the population’s gene pool.

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds

How do you use the elimination method for this question? explain, because i really want to understand!