Thus, a genotype's frequency will decline or increase depending on whether its fitness is lower or greater than the mean fitness, respectively. In the particular case that there are only two genotypes of interest (e.g. representing the invasion of a new mutant allele), the change in genotype frequencies is often written in a different form.
1 Places such as Lowes and Home Depot will charge around $60 per day. 2  According to DoItYourself.com, they claim that average daily rental is going to be around $60 per day. 3  They also note that a good pressure washer should cost you around $350. 4  SunbeltRentals.com offers a variety of pressure washers.
Currently, the cost of QuietRock 510 is about $52 per 1/2 thick, 4' x 8' panel at Lowe's. Also from Lowe's, the cost of one sheet of conventional 1/2 thick drywall is $11.00. This means that you can purchase nearly 5 sheets of conventional drywall for the cost of a single sheet of QuietRock #510. Comparing the two products on the basis of STC ratings, soundproof drywall would be the wiser purchase because it allows you to pack in greater sound absorption in a smaller size.