Which describes marginal analysis?

the personal satisfaction gained from consumption

weighing the extra costs and benefits of one more unit

reluctance for taking chances when making investments

buying goods according to what one wants or needs

c. the dred scott v. sandford case,

whose power in the senate is equal to the power of the speaker of the house?

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.