7) Once oil was discovered in Texas, town were quickly built throughout the region. What name is usually given to these kinds of developments? A) "Boomtowns" B) "Spindletops" Eliminate C) "Brownfields" D) "Texas Tea Republics"

boomtowns

Explanation:

The term "boomtowns" is used to describe any city or development that pops up quickly around a rapidly-growing industry. This term is also used to describe the cities that appeared- and disappeared- quickly around gold mines in the west.

part a. there were 250 teenagers surveyed (100% of tenagers = 250)therefore 1 % = 250/100 = 2.5 76% = 1% x 76 = 2.5 x 76 = 190 teenagers of the 250 surveyed liked burgerspart b: jane surveyed 25% (which is equal to 50 teenagers, i.e. a quarter of the teenagers surveyed is 50) to get 100% we simply get 4 quarters, i.e. multiply 50 by 4 = 200 teenagers were surveyed by jane. part c: it is impossible to give an example where a percentage is greater than 100%, since, by definition , percentage means "per 100".