Th correct answer is letter A. Echo sounding is very useful for depth profiles where SONAR is used to determine the depth of water through the transmission of sound pulses. It is calculated by checking the interval between the mission and the pulse that is recorded within the SONAR device.
Option c is correct. The best description of the pattern of Swedish American ethnicity is that there is a a Swedish ethnic majority in the northern half of the state.
This question involves a map so to answer it one must take a close look at the map. The map is made up of black, grey and white areas.
The answer to this question can be seen in the <u>black area</u>. This part has the most percentage of about 15% to 25%.
The Northern part of the map is the at the top of the map. Therefore we conclude that the majority of 15 to 25 percent are in the Northern half of the state.
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I thinks its a town that should be it
