Which natural hazards threaten central america?
a. avalanches
b. earthquakes
c. hurricanes
d. tornadoes
e. volcanoes

Use a graphing calculator to solve the equation - 3 cos t = 1 in the interval from 0 ≤ theta ≤ 2 π round to the nearest hundredth.

In north america, most winter storms form when cold, dry air from interacts with warm, moist air from

Which barrier to economic development is shown in the following examples? i. the high rate of hiv infection in underdeveloped nations ii. the use of children as soldiers in uganda’s army in the early 2000s iii. low literacy rates in underdeveloped nations with limited exposure to adequate education a. foreign debt b. political instability c. widespread disease d. low levels of social welfare