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.
Cost breakdown. Labor: call a professional for large jobs, removing mildew and mold and for preparing surfaces for paint. Professional pressure washing costs between $60-$100 per hr. An area of 1200 sq.ft. will take 6 hours for a total cost of between $360-$600. Equipment rental: pressure washing can be a do-it-yourself project.