Answer:
Kat should get a whistle that emits sounds in the range of <u>23 and 54,000 Hz</u>.
Explanation:
The hearing range is the frequency range that can be heard by the animals, including humans.
Generally, the hearing range of humans is about 20 to 20,000 Hz and the hearing range of dogs is around 67 to 45,000 Hz
Dog whistles are the whistles which emits ultrasonic sound and are used for training dogs. <u>Generally, the dog whistles are within the range of 23 to 54,000 Hz and thus, can not be heard by the humans.</u>
Answer:
probably 100 miles
Explanation: because it looks pretty far away
Andrew Jackson (1767-1845), seventh president of the United States, symbolized the democratic advances of his time. His actions strengthened the power of the presidential office in American government. The second crowd that showed up at the mansion was made up of Jackson supporters who were dressed in their best clothes.
D: The United States was meant to stretch from the Atlantic ocean to the Pacific ocean
Answer:
B 50 1 x 106
Explanation:
The largest Island and the one that is closest to the mainland would mean that such Island would have more biodiversity. 50 km from the mainland is a considerably close distance and the largest with 1*10^6 hectares represents a huge area that would allow for more biodiversity.