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 of Pressure Washer. Without a pressure washer, you cannot get started in this industry and you could potentially choose one of many different types. For the lower-end commercial pressure washers, you could expect to pay around $1,000, as of the time of publication. If you want one of the high-end commercial pressure washers, you could spend over $6,000.