This single disease was the most serious obstacle to European conquest of the tropical world, responsible for thousands of settler deaths
throughout the eighteenth and nineteenth centuries.
http://www. pbs. org/gunsgermssteel/variables/malari a. html
The discovery of which drug was most responsible in addressing the
problem posed in this excerpt?

Emily works at a perfumery. she extracts 3 liters of essential oil for perfumes in 2 days. 1: assuming emily extracts essential oil at a constant rate, we can graph this relationship with time in days along the x-axis and quantity of oil in liters along the y-axis. the slope of the line representing this relationship is __ 2: a point on this line that corresponds to the amount of oil emily extracts after 5 days is (5,

Why might it be important to know a currency’s exchange rate

“[the city’s engineers excelled in areas] neglected by the greeks, such as the construction of roads and aqueducts, and of sewers that could wash the filth of the city into the tiber. they have built paved roads throughout the country, leveling ridges and filling up hollows, so as to make possible the movements of heavily loaded wagons. . and such is the quantity of water brought in by the aqueducts, that veritable rivers flow through the city and its sewers: almost every house has cisterns, waterpipes, and copious fountains.” —strabo, as quoted in empires ascendant: time frame 400 b.c.–a.d. 200 cisterns are tanks that hold water until it is needed; if a house has a cistern, it is likely to also have a. aqueducts. c. a swimming pool. b. a fish pond. d. sinks and faucets.