State the number of degrees of longitude that separates new york city from reno, nevada, and the time
difference, in hours, between these two cities.

Base from the graph the number of degrees of longitude that separate new York and reno Nevada is 120 – 75 = 45 degrees of longitude. The time difference can be calculated by dividing it by 15 degree because for every 15 degrees there is 1 hr difference. 45 / 15 = 3 hr difference

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an angle + its complement = 90 degrees