Answer:
Radio-wave communications signals travel through the air in a straight line, reflect off of clouds or layers of the ionosphere, or are relayed by satellites in space. They are used in standard broadcast radio and television, shortwave radio, navigation and air-traffic control, cellular telephony, and even remote-controlled toys.
Explanation:
The correct answer is D. 70% or below
Explanation:
The term national elections refer to mainly the elections of the president and vice president of the U.S. that take place every four years and in which citizens from all states of the United States are asked to vote, this date usually coincides with other federal or local elections. Even though this election system has been used for many years it has been widely criticized, one of the reason for this is the low percentage of citizens that vote in national elections as this can imply this system is not really democratic as the opinion of the majority of U.S. citizens is not reflected on the elections, in this way during the elections of 2004 the percentage of eligible population that voted was 60.1%,and in in 2008 this percentage was 61.4%, which was the highest percentage since 1968 which suggest in most election the percentage has been near to 70% or under 70%. Thus, the percentage of eligible Americans that vote on national elections is around 70% or below.
Answer:
Aqueduct
Explanation:
an artificial channel for conveying water, typically in the form of a bridge across a valley or other gap.
