For example the median expected annual pay for a typical Zoologist in the United States is $69,043, so 50% of the people who perform the job of Zoologist in the United States are expected to make less than $69,043. Source: HR Reported data as of August 2016. view as graph view as table.
1 Acre = 0.00404685642 Square Kilometers. Acre is used in imperial, U.S. customary systems for land measurement , agriculture and forestry. The abbreviation is ac. Square kilometer is a metric system unit, used mostly in measuring land.
According to google, 1 acre is the equivalent of 43560 square feet. 1 acre is defined to be 1 chain (66 ft) by 1 furlong (660 ft). So an acre is 66 ft * 660 ft = 43560 sq ft. The international definition is exactly the same area, but in square meters: 4046.8564224 sq m.