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.
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. Gas and electric pressure washers are available from big box hardware stores like Home Depot and Lowes for $76-$99 per day rental with a $100-$150 deposit.