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.
An acre is about 0.4047 hectare and one hectare contains about 2.47 acres. In 1795, when the metric system was introduced, the are was defined as 100 square metres and the hectare ( hecto-  + are) was thus 100 ares or 1â100 km 2.