To find out how many city blocks would equal a mile, divide 5,280 feet by the number of feet in a block in the city in question. For example, the blocks in Tucson, Arizona are 400 feet long. That would mean that 0.2 miles would be the same as 2 blocks.
The standard block in Manhattan is about 264 by 900 feet (80 m × 274 m). In Chicago, a typical city block is 330 by 660 feet (100 m × 200 m), meaning that 16 east-west blocks or 8 north-south blocks measure one mile, which has been adopted by other US cities.
A femtogram (fg) is a decimal fraction of the base unit of mass in the International System of Units (SI) kilogram. 1 fg = 10⁻¹⁵ g = 10⁻¹⁸ kg.
Femtogram to Kilogram Conversion TableFemtogram [fg]Kilogram [kg]1 fg1.0E-18 kg2 fg2.0E-18 kg3 fg3.0E-18 kg5 fg5.0E-18 kg
120 daysThe FHA appraisal validity period is 120 days. (2) the borrower signed a valid sales contract prior to the expiration date of the appraisal. An appraisal update must be performed before the initial appraisal, with no extension, has expired.