In the 1970s, there was a renewed interest in mining and opening old shafts from the gold boom era. this created
a.
b.
increased flooding in the surrounding areas
the reconstruction of old mining towns as tourist attractions
overcrowding, as an influx of prospectors moved to the area
a great debate between mining prospectors and conservationists

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

3 notebooks and 3 pencils packages

step-by-step explanation:

((3×1.25)+(3×2.75))=12

3×1.25=3.75

3×2.75=8.25

3.75+8.25=$12